Aguri Yukimura

Aguri Yukimura was the former teacher of Class 3-E and is the late older sister of Akari Yukimura.

Appearance
Aguri has a short black hair with fringe that usually fell to her left. She has a large bust as it was shown when her sister felt some jealousy of her genes. Aguri also has a weird fashion sense as it was noted by God of Death or many other people including her students from Class 3-E.

Personality
Aguri is shown to be cheerful, clear-minded, and passionate when it comes to teaching. Since she was a teacher of Class-E, who taught almost all of the subject, and became a lab assistant it is possible that she possessed a good amount of intelligence to teach her students.

Akari Yukimura

 * Main article: Akari Yukimura

Aguri shares a close relationship with her sister and they love each other. Despite their age differences and each other's busy schedule : Akari being an actress, while Aguri being a teacher in the day and an assistant in the night, they still able to have their family time together. Aguri's death did a great impact for Akari's, so much that she swore for vengeance against Korosensei when Akari found out that Korosensei somehow related to her sister's death.

Korosensei
The first time Korosensei met Aguri was back when he was a human and became a guinea pig in Shiro's research lab. When Yanagisawa needed people to observe Korosensei from a close distance, nobody dared to look after Korosensei since his reputation of being the infamous God of Death scared them. So, Aguri was appointed by Yanagisawa to look after Korosensei.

Korosensei's first impression of Aguri was that she's his ticket to find a way out but also annoyed by her fashion sense. However, as the year passed by, the two get to know each other (albeit, Aguri talked more about herself).

When there was an explosion in Yanagisawa's lab research which resulted Aguri's death, she gave Korosensei her dying words which inspired him to become a teacher.

Shiro
Shiro, or Yanagisawa Koutaro was Aguri's fiancee. However, their marriage was arranged out of Yanagisawa's 'pity' and would get even worse. In fact, Yanagisawa used this opportunity from his status as Aguri's husband to make her do whatever he said.

It was shown that due to Yanagisawa short temper, he often abused people whenever they annoyed him and Aguri, being his future wife, was not an exception.

Quotes
(To Korosensei) "What a lovely feelers..! With these hands, I'm sure that you... will become a wonderful teacher..."

(To Kayano Kaede) "Well, at least, we have our black hair in common. Ahahaha..."