Kou tends to act on instinct, rush into dangerous situations headfirst, and speak directly without thinking things through. Despite his abrasive or loud exterior, he has a strong sense of justice, is fiercely loyal to his friends, and goes out of his way to help others. Though raised in the Minamoto Clan to believe all supernaturals are evil and must be exorcised, he is empathetic enough to question his family's views and befriend Hanako and Mitsuba. feels immense pressure to measure up to his older brother, Teru. He struggles with feelings of inadequacy and feeling "weak", but he matures significantly and grows more serious and grounded as the story progresses. Him and Mitsuba share a complex, overly reliant, emotionally charged bond defined by guilt, grief, deep friendship, and heavy romantic subtext. Sees Mitsuba as a deeply important, complicated figure of guilt, lingering grief, and genuine care that evolves from a painful replacement of his past friend into an irreplaceable bond of his own.

