She is Keima's classmate at Maijima Private High School. Her defining character traits include general cheerfulness and athleticism. She is a rising star in the track and field team at Maijima and quite possibly the fastest person in the school. In the anime and an omake, she is depicted as running recklessly to get anywhere, often running in her haste into walls or people. It is because of this that she is now referred to as "Mai High's Human Missile." Although she initially succumbed to upper-classman pressure, along with her own insecurity; lack of self-confidence, with the help of Keima, she quickly became an important member of the team. One of her habits is to tie her hair up whenever she is preparing to run seriously.

The female protagonist of the series. She chose to take up Mr. Tadano’s offer to live with Mugi after her father died, because she did not want to trouble her mother’s new marriage. She is a good-natured girl who is smart and responsible. She is described as being very cute with a developed body. She is popular in school and has an easy time making friends. Unlike her sister, she chooses to come back to Onomichi to live with Mugi instead of moving to America with her mother. Although at times she has denied having any romantic interest in Mugi, she often gets jealous when Mugi is with other girls.

A young, yet powerful, demon of Chaos and the one responsible for Jae Hyuk's death. She killed him while fighting, when Jae Hyuk was trying to bring his ill brother to the hospital. Feeling slightly guilty, she asks him "Do you want to live?", to which Jae Hyuk answers yes. She brings him from the dead, making him an undead, much to his disbelief, and ends up dragging him back to her world, the world of Chaos.

Неделима част от групата на Коко - изключително добър боец (добре се справя с ножовете!!!) и гледайте да не я ядосвате. Има някаква странна наклонност да оставя Коко да я опипва, а мъжката част от групата съответно получава кръвоизлив от носа (с изключения на Йохан xDDD) Отличителната и черта е че губи едното си око при мисия и ... мисля че толкова ви стига като инфо -> ходете четете мангата за още...

Serin и Valmet

Yuu + Serin

Yuu + Serin