Yuuki (red) and Kouki (blue) are two halves of a whole. When the two co-front, they refer to themselves as "Ajisai" (purple), and typically try to pretend they're just one phox.

Yuuki is quiet, introspective, and incredibly sensitive to changes in others' moods. He carries strong convictions, and strives to do the right thing. Yuuki is constantly trying to improve himself.
Kouki meanwhile is outgoing, generous and assertive. He loves new experiences, and isn't afraid of making his voice heard. However, as a result, Kouki tends to come off as boisterous or nosy.

Likes: Light breezes, Cloudy weather /  Challenges or puzzles, Learning new things
Dislikes: Sudden noises, Being all alone / Seeing others cry, Being overshadowed