Kotonoha Katsura is a Virtual YouTuber who makes content in Japanese. Originally from the visual novel School Days, she is associated with Overflow. While Kotonoha for the most part is calm and gentle, she has a very delicate psyche, which under stress can lead to irrational culpability, delusions and even malice. Hence, she is a well known yandere character.
A sweet girly girl and noticeably well-endowed bookworm, Kotonoha Katsura becomes the initial love interest of Makoto early into their second term, and with some effort from Saionji Sekai, becomes his girlfriend after she reciprocates her affection for him.