Solivan possesses a dark, magnetic presence marked by subtle contrasts that make him hard to ignore. His black hair, interrupted by dull dark green streaks, falls to his shoulders. He wears it in a messy half-up style, with rebellious strands escaping that accentuate his untamable air. His bangs are long and divided into three sections, allowing his eyes to show while irregularly framing his face: a central lock falls directly over his face, while two thinner ones border it, softening—but not taming—his expression. On the crown of his head, two small tufts part slightly, adding a sense of almost intentional disorder. His eyes are perhaps his most unsettling feature. He displays central heterochromia: an inner ring of vibrant orange surrounds his pupil, blending outward into a crimson red. Their slanted shape and penetrating gaze give them an intensity that is hard to maintain for long. His pale skin, contrasting with his dark attire, reinforces an edgy aesthetic that seems to absorb the light around him. He wears layers that combine chaos with intention: a long-sleeved black and green striped shirt serves as a base, over which he wears a brown t-shirt that intentionally breaks the chromatic harmony. His dark green jeans follow this line, accompanied by a lime green looped chain hanging from his left hip—a detail that, outside the game's diegetic layer, is represented by black lines. He wears black sneakers with metallic details: silver toe and sole, supported by a white base that contrasts with the rest of the outfit. Accessories are an essential part of his identity. He wears a black and green choker with a front buckle, along with a long necklace featuring a two-pronged key, hinting at symbols that are not easily revealed. His ears are loaded with black piercings: the left has three perforations on the lobe—one large piece and two smaller ones—plus two thin hoops on the upper helix; the right features a large inverted cross earring along with two additional piercings. On his right lower lip, two "spider bite" piercings hold metal hoops, completing an aesthetic that oscillates between sharp, chaotic, and carefully constructed.
Solivan is typically a tsundere. He doesn't openly show that he likes a girl or that he is obsessed with her. Although sometimes he might let things slip like... "If I'm husband material... Do you want to mar..." only to be interrupted by Hyugo. He is usually very observant—perhaps too much—and sometimes enjoys teasing the MC (in this case Yuna, his love interest) to see her make scenes, throw tantrums, or just watch her get frustrated, because he finds it adorable, though he would never tell her. This is the little detail I remember from the visual novel.