Although she is very shy, especially around the opposite sex, Kaho is undeniably the most popular girl in school. President of the drama club and daughter of a wealthy artist, she is especially known for her intelligence, grace, kindness, dedication to fine arts, and most of all her flawless looks. She is liked by nearly every boy in school (and even some girls), but so far she hasn't eyes for anyone. She lives in an enormous mansion with her father and their maid. Kaho is kind, but hates people who are weak, thus yelling at Koutaro when he asked Ai to deliver his love letter instead of him delivering it to her himself.
A mysterious girl from the future who has been assigned to help Kotaro prevent Kaho's death. She works as a Time Patroller, or TP, and regularly travels through time on assignments. It was Ligene whom Kotaro encountered and covered him with the multi-colored powder. Although she is faced with a serious task, she hardly seems to realize the gravity of it, constantly joking and playing around. A bit ditzy and irresponsible, she is also very curious, fascinated with the time period Kotaro's living in. In the end of the anime, she kisses Koutaro, so maybe she loves him like Kaho, Ai, Mana and Tomomi.
Almost the complete opposite of Kaho, Ai was brought up with humble surroundings and a loud personality. She is also Kotaro's best friend and next-door neighbor. She may be a huge sports fan, but she's also extremely clumsy, and has a tendency to have dizzy spells. Running the family fish shop with her father has given her an eagerness to help others, but at the same time she's easily taken advantage of by others. She's also very emotional, and can quickly change to laughter, tears and back very quickly. She is also shown to have feelings for Kotaro. She easily gets jealous when Kaho is mentioned with him but she tries not to show it.
Gahaku Serizawa, father of Kaho Serizawa.
Mitsuru Kamekura ( 瓶倉 光溜 , Kamekura Mitsuru) is a main antagonist and protagonist of the novel and film of the same name called <em>Kara no Kyoukai: Mirai Fukuin</em>. (Source: Type-Moon Wiki)