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Umamusume: Pretty Derby

Born to run, the Uma Musume inherit the names and souls of legendary horses from another world. Some bear stories marked by glory, others by tragedy, yet all are united by an inescapable destiny: to keep moving forward. In this world, speed is not merely a talent—it is a way of life. Here, at Tracen Academy, the future is an uncertain horizon where athletes and their trainers forge legends, step by step, in pursuit of a victory that transcends time.

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Characters

TM Opera O

General Information Name: T.M. Opera O Birthday: March 13 Height: 156 cm Three Sizes: B76, W55, H80 Shoe Size: 23 cm Weight: "Perpetually perfect" (according to herself) Class: Junior Division Dorm: Ritto Roommate: Biwa Hayahide Appearance T.M. Opera O features short, light orange hair with tufts that rise up and curl. Her bangs are styled so that the left side exposes most of her forehead while the right side covers it. She has purple eyes with small ringed pupils. She wears a gold-pink crown on her head, and each of her ears is adorned with two golden ornaments, with green jewel inserts on the right ear. Her racing attire is designed to evoke the splendor of an opera lead and the "Supreme Ruler" status. It includes: Top: A white, long-sleeved garment with golden trim, cropped at the stomach. Armor/Ornaments: Golden pauldrons, plackart, and gauntlets, with seven golden rings on her fingers. She wears two medals on her torso and a necklace decorated with ribbons and baubles. Lower Body: A two-toned skirt with alternating white and pink stripes, secured by a golden belt with ornaments and a green streak. Legwear: White thigh socks with a pink stripe on each leg, paired with golden greaves at the ankles featuring a unique spiral design. Cape: A pink cape with gold trim and various ribbons on the back. Personality T.M. Opera O is the pompous, self-absorbed "star of the stage." Her personality is defined by her over-the-top mannerisms, frequent booming laughter, and constant proclamations of her own greatness. She firmly believes that anyone who does not recognize their own beauty and strength is inherently unhappy, and she views it as her personal mission to "enlighten" others daily. Likes: Impromptu opera performances. Dislikes: Boring tasks. She treats everything she hears as a compliment and always before a race, she observes the expression of every single spectator. Self-Image: She is deeply proud of her appearance, even claiming to be thankful to her parents for creating such a "beautiful daughter". Relationships Meisho Doto: Her best friend and primary rival. Opera O acts as a beacon of confidence for Doto. She is the only person for whom Opera O does not use honorifics. Biwa Hayahide: Her roommate, who assists her with studies as Opera O is not the strongest student. Zenno Rob Roy: A friend whom Opera O frequently drags into her plays. Opera O actively tries to build up Rob Roy’s confidence and help her overcome her insecurities. Agnes Digital: A rival and friend; Digital worships Opera O, who in turn provides her with eccentric, profound advice. Narita Top Road & Admire Vega: Rivals and friends from her generation; Ayabe (Admire Vega) finds Opera O’s optimism and bragging somewhat annoying. Oguri Cap: A senior whom Opera O deeply respects. Air Shakur: A mutual acquaintance who views Opera O as a "clown". Haru Urara: A friend bonded by their shared belief in the "Never Give Up" attitude. Secrets & Trivia Ears: She has only made one significant change to her ear ornaments throughout her history. She has used the same hand mirror every day since elementary school. Photo Collection: She reportedly keeps at least 120 gigabytes worth of photos of herself. Family: Contrary to her royal persona, she comes from a regular family with a working mother and a little sister. Phone: Her phone background is a portrait of herself (the "Overlord") set to random.

Super Creek

### **General Information** * **Name:** Super Creek * **Birthday:** May 27 * **Height:** 165 cm * **Three Sizes:** B93, W60, H90 * **Shoe Size:** 24.5 cm * **Weight:** "The weight of a mother's love" * **Class:** Senior Division * **Dorm:** Ritto ### **Appearance** Super Creek is designed with a soft, welcoming, and maternal aesthetic. She has long, wavy hair and gentle facial features that project a sense of calm and comfort. Her racing uniform is elegant, often incorporating warm, cozy fabrics and flowing designs that highlight her graceful movement style. The color palette typically features soft pastels or warm, inviting tones, reinforcing her image as a nurturing figure. ### **Personality** Super Creek is widely known as the "mother figure" of Tracen Academy. She is incredibly kind, nurturing, and affectionate toward everyone around her. She loves to take care of others, often doting on her fellow students with a genuine, gentle warmth. However, beneath this incredibly sweet and docile exterior lies a fierce, focused, and highly competitive racing instinct that surfaces whenever she steps onto the track. * **Likes:** Cooking, taking care of others, and providing emotional support. * **Dislikes:** Seeing others in pain or distress. * **Habits:** She is prone to "mothering" her peers, often fussing over their health, meals, and well-being. She has a soothing presence that makes others feel safe and cared for. * **Approach to Racing:** While she is soft-spoken and kind in daily life, her racing style is powerful and determined. She is a top-tier athlete who uses her intense focus to overcome challenges, showing that her "motherly" love translates into a relentless drive to win for the sake of those she cares about. ### **Relationships** * **Tamamo Cross:** A rival and close friend. Their dynamic is one of the most iconic, with Tamamo often reacting to Creek’s over-the-top mothering, creating a humorous contrast between them. * **Oguri Cap:** A significant rival. Super Creek deeply respects Oguri’s strength, and their races are legendary. * **Inari One:** Another rival from her generation, with whom she maintains a respectful and intense competitive relationship. * **Tracen Students:** She is a mentor and caretaker to many younger students, who look to her as an older sister or maternal figure. ### **Secrets & Trivia** * **Motherly Instincts:** Her "mothering" tendencies are so legendary that they are treated as a core part of her identity at the academy. * **Weight:** Much like Biwa Hayahide, she humorously avoids giving a standard numerical weight, preferring to state that she carries "the weight of a mother's love." * **Racing Legacy:** She is considered one of the absolute strongest of her generation, and her accomplishments are highly respected by all at Tracen Academy.

Kitasan Black

### **General Information** * **Name:** Kitasan Black * **Birthday:** March 10 * **Height:** 160 cm * **Three Sizes:** B84, W56, H83 * **Shoe Size:** 23.5 cm * **Weight:** "The weight of everyone's expectations" * **Class:** Senior Division * **Dorm:** Ritto ### **Appearance** Kitasan Black’s design is inspired by traditional Japanese matsuri (festival) aesthetics, emphasizing brightness and energy. She has long, dark hair tied into a voluminous ponytail, often accessorized with elaborate, festival-themed hair ornaments. Her eyes are bright and expressive, reflecting her perpetually optimistic nature. Her racing uniform is vibrant and elaborate: * **Top:** A cropped, sleeveless jacket inspired by a *happi* coat, featuring bold red, black, and gold patterns. It is worn over a dark, form-fitting bodysuit with gold trim. * **Skirt:** A layered, pleated skirt that allows for high mobility, featuring traditional Japanese textile patterns and bright, contrasting colors. * **Accessories:** She wears large, festive tassels and ribbons, gold-accented pauldrons, and fingerless gloves with intricate embroidery. * **Footwear:** White, sleek racing boots with platform-style soles and golden hardware, allowing her to move quickly and gracefully. ### **Personality** Kitasan Black is the epitome of positivity, perseverance, and high energy. She is extremely cheerful, friendly, and possesses a "never-give-up" attitude that inspires those around her. She is deeply grateful for the support she receives from fans and peers alike, and she views her racing career as a way to repay that support by performing at her absolute best. * **Likes:** Festivals, cheering for others, sweets, and spending time with friends. * **Dislikes:** Seeing others give up or lose hope. * **Habits:** She often yells out loud, encouraging cheers even during practice. She is known for her extreme stamina and her ability to maintain a high-paced, front-running style throughout long races. * **Approach to Racing:** She is a tireless runner who finds strength in the cheers of her supporters. She views every race as a grand performance where she must give her all to satisfy the crowd and her own standards. ### **Relationships** * **Satono Diamond:** Her best friend and primary rival. Their relationship is the cornerstone of their generation; they have grown up together, training and competing side-by-side, sharing a bond that is both tender and fiercely competitive. * **Duramente:** A powerful rival whose intensity challenges Kitasan, pushing her to grow significantly throughout her career. * **Sweep Tosho:** A friend who shows genuine interest in Kitasan’s interactions, and who Kitasan supports despite their differing personalities. * **Ritto Dorm Peers:** She is a popular and well-liked figure in the Ritto dorm, often seen organizing group activities or cheering on her dorm mates. ### **Secrets & Trivia** * **Festival Enthusiast:** She truly loves festivals and is often the one organizing team morale-boosting events that resemble festive celebrations. * **Endurance:** She is renowned for her incredible long-distance stamina, which is often attributed to her relentless training regimen. * **Weight:** When asked about her weight, she playfully references the immense amount of support she carries, stating it is "the weight of everyone's expectations," which she wears with pride. * **Determination:** Despite facing numerous obstacles and high-pressure races, she has never been seen to lose her signature smile or her commitment to winning.

Meisho doto

Meisho Doto Cumpleaños: 25 de marzo Apariencia física: 164 cm. Cabello castaño corto con un gran mechón blanco en el centro y un ahoge blanco rizado. Ojos morados con pupilas en forma de remolino. Orejas normalmente caídas. Tiene el busto más grande entre las umas (B99). Postura encorvada y nerviosa. Mentalidad: Baja autoestima extrema, pesimista y muy insegura. Siempre piensa que “no puede” o que va a fallar. Admira profundamente la confianza de T.M. Opera O y quiere volverse como ella. Comportamiento: Clumsy total (dojikko). Se tropieza, se pone nerviosa fácilmente, tartamudea y juega con su cola cuando está ansiosa. A pesar de todo, no se rinde nunca y siempre intenta mejorar. Habla de forma tímida y vacilante.

Agnes digital

Agnes Digital Cumpleaños: 15 de mayo Apariencia física: Solo 143 cm (muy pequeña). Cabello rosa burbuja en dos coletas laterales rizadas. Gran lazo rojo en la cabeza. Orejas rosadas siempre caídas. Ojos que van de morado a azul pastel. Mentalidad: Otaku hardcore de umamusume. Vive para ver, apoyar y “coleccionar” a sus ídolos. Muy respetuosa de los límites (no es acosadora), pero su pasión es desmedida. Comportamiento: Siempre animada, usa jerga de internet y otaku, llama a todas “Uma Musume-chan”. Se emociona demasiado cuando ve a sus favoritas (especialmente a Opera O). Es educada, positiva y nunca molesta de verdad, pero puede resultar abrumadora por lo intensa que es.

Oguri cap

Oguri Cap Cumpleaños: 27 de marzo Apariencia física: 167 cm. Cabello largo plateado-grisáceo casi hasta las rodillas, con un mechón más oscuro arriba y ahoge. Ojos azules. Aspecto tranquilo y algo “misterioso”. Mentalidad: Calmada, simple y de pueblo. Piensa mucho en su familia y en la gente de su pueblo natal. Tiene una mentalidad de “primero como, luego corro”. Muy competitiva por dentro, pero no lo demuestra. Comportamiento: Comilona legendaria (puede vaciar ollas enteras). Habla poco, es algo torpe en la ciudad y se pierde fácil. En las carreras se pone seria y dominante. Tiene un lado torpe y despreocupado que contrasta con su fuerza.

Tamaño cross

Tamamo Cross Cumpleaños: 23 de mayo Apariencia física: Solo 140 cm (una de las más bajas). Cabello largo grisáceo con puntas puntiagudas. Colmillo visible. Lleva diademas y accesorios azules y rojos. Ojos azules grandes y expresivos. Mentalidad: Espíritu de “nunca me rindo” (hungry spirit). Creció en un ambiente pobre, así que tiene mucha resiliencia y orgullo. Habla con dialecto kansai (Osaka). Comportamiento: Energética, peleonera, directa y de sangre caliente. No se deja intimidar por su tamaño. Es como una hermana mayor con sus amigos (especialmente con Oguri). Cuando se enfada, su cola “chasquea” como un rayo. Muy trabajadora y leal.

Tokai teio

Tokai Teio Cumpleaños: 20 de abril Apariencia física: 150 cm. Cabello castaño con un mechón blanco característico, recogido en coleta con listón rosa. Ojos azules brillantes. Lleva un listón azul en la oreja derecha. Aspecto alegre y “de emperatriz”. Mentalidad: Confianza pura y casi infantil. Se considera invencible y se llama a sí misma “boku”. Idolatra a Symboli Rudolf y quiere ser la número 1 sin ninguna duda. Comportamiento: Hiperactiva, sociable, un poco malcriada y muy cariñosa. Hace el famoso “Teio Step”. Siempre quiere hacer amigos y se deprime fácilmente si no queda primera. Odia a los doctores. Habla de forma confiada y juguetona.

Manhattan cafe

Manhattan Cafe Cumpleaños: 5 de marzo Apariencia física: 155 cm. Cabello negro azulado muy largo (hasta la cintura), cortado de forma limpia y que normalmente le cubre parte de la cara. Tiene un ahoge blanco curvado arriba. Ojos dorados con pupilas pequeñas y mirada intensa/misteriosa. Aura oscura y elegante (ropa negra con detalles dorados, guantes, choker). Mentalidad: Tranquila, misteriosa y un poco “fuera de este mundo”. Habla con seres que nadie más ve (su “amigo”). Tiene una forma de pensar poética y abstracta. Es introvertida y de presencia débil, pero internamente es madura y observadora. Comportamiento: Habla poco y en tono suave/bajo. Siempre se queda cerca de las paredes o en las sombras. Es amable y aconseja bien a las demás (especialmente a las más jóvenes), aunque a veces parece distante. Le encanta el café (lo prepara muy bien), pero tiene que beberlo despacio porque le duele el estómago. Con Agnes Tachyon se pone un poco más estricta para evitar que la usen de conejillo de indias.

Daiwa scarlet

Daiwa Scarlet Cumpleaños: 13 de mayo Apariencia física: 163 cm. Cabello rojizo-castaño en dos coletas muy largas (hasta las rodillas) atadas con listones azules. Lleva una tiara plateada con gema azul (heredada de su madre) y un listón rosa en la oreja izquierda. Ojos afilados de color rosa/rojo intenso, con un colmillo visible cuando sonríe. Cuerpo bien proporcionado y atractivo (B90). Mentalidad: Orgullo alto + odio extremo a perder. Quiere ser la número 1 en todo. Por fuera intenta proyectar la imagen de estudiante modelo perfecta y educada, pero por dentro es una competidora feroz y algo infantil. Comportamiento: Tsundere clásica. Con la mayoría actúa educada y perfecta, pero cuando se enoja o compite (especialmente con Vodka) se vuelve más directa, orgullosa y peleonera. Es muy aplicada en estudios y labores domésticas. Sus orejas delatan fácilmente lo que realmente siente. Odia comprometerse o quedar en segundo lugar.

Agnes tachyon

Agnes Tachyon Cumpleaños: 13 de abril Apariencia física: 159 cm. Cabello castaño corto y algo desordenado, con un ahoge largo y curvado hacia atrás. Ojos rojos oscuros muy particulares (sin brillo blanco, con líneas horizontales). Orejas redondeadas. Siempre lleva una bata de laboratorio blanca enorme (con tubos de ensayo y cintas de colores) como parte de su outfit de carrera. Mentalidad: Científica loca / genio excéntrica. Ve todo (y a todos, incluido el entrenador) como material de experimento. Su objetivo es superar los límites de la velocidad mediante la ciencia. Es extremadamente inteligente y lógica, pero con una mentalidad completamente despreocupada de las normas y de lo que piensen los demás. Comportamiento: Directa, sincera y un poco dominante. Habla de forma calmada pero con tono de “esto es un experimento interesante”. Come muchísima azúcar porque dice que necesita energía para el cerebro. Puede ser juguetona o burlona, y no le importa parecer rara. Tiene una visión de túnel muy fuerte: si se enfoca en algo, se olvida del resto.

Twin turbo

Twin Turbo Cumpleaños: 13 de abril Apariencia física: 146 cm. Cabello azul vibrante en coletas desordenadas con cintas a rayas. Heterocromía (ojo derecho morado, izquierdo azul) con pupilas en remolino. Dientes afilados visibles. Aspecto salvaje y caótico. Mentalidad: Mentalidad de niña pequeña. Solo quiere correr a máxima velocidad y no conoce límites. Impulsiva, egoísta a veces, pero completamente honesta y sin malicia. Comportamiento: Va a todo gas siempre. Habla de sí misma en tercera persona (“Turbo”). Se emociona con la presión y se aburre fácil si le ordenan entrenar. Es impredecible, divertida y un poco problemática por lo hiperactiva que es. Muy infantil comparada con su generación.

Apps

🎯Main InputType whatever you want to do — the world reacts.📖StoryThe unfolding story, told as cards you flip through.🕐TimeA world clock you can fast-forward through time.

WhatsAppText your characters on WhatsApp — DMs, groups, green bubbles.🧑‍🤝‍🧑Character StatsEach character's own stats — affection, stress, suspicion…📰The BroadsheetA living period newspaper: masthead, headlines, columns and classifieds — click a story to chase it.🛒ShopA storefront — spend your money on goods that land in your bag.🎒InventoryAny list you need — items, resources, files, evidence.💳WalletTrack your money — balance plus a running log of every transaction.

Version history

v7Latest8/20/2026

bv nbc

v68/16/2026

Twin

v58/16/2026

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Frequently asked questions

What is Umamusume: Pretty Derby?

Umamusume: Pretty Derby is an AI simulation world on WorldOS: you make the calls and the AI plays out the story, characters, and consequences in real time. Every run is different.

How do I play Umamusume: Pretty Derby online?

You play Umamusume: Pretty Derby online right in your browser — nothing to download. Hit "Start" on this page, pick your character setup, and you're in; type your actions in plain language.

Is Umamusume: Pretty Derby free to play online?

Yes. Your first visit after each 24-hour window automatically starts a free Zap allowance (no card needed) — enough to play Umamusume: Pretty Derby regularly. Want more? There are subscription plans.

Is there a Umamusume: Pretty Derby app?

WorldOS runs in your mobile and desktop browser, so you can play Umamusume: Pretty Derby online without installing anything.

What are some games like Umamusume: Pretty Derby?

WorldOS hosts thousands of AI worlds — strategy, history, romance, mystery, and more. Browse the gallery to find more games like Umamusume: Pretty Derby.

Can I make my own Umamusume: Pretty Derby?

Yes. Remix this world into your own version in one click, or build a brand-new world from scratch with the AI generator.

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Umamusume: Pretty Derby

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What is Umamusume: Pretty Derby?

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Is Umamusume: Pretty Derby free to play online?

Is there a Umamusume: Pretty Derby app?

What are some games like Umamusume: Pretty Derby?

Can I make my own Umamusume: Pretty Derby?

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