15 years old, and Iku's twin brother. He is intelligent and somewhat cold, but has a hidden soft side, especially for Iku. He has been in love with Iku since childhood and embarks on a relationship with her, even though he is tormented over their incest taboo. Halfway through the series, it turns out that Yori is Iku's half-twin brother and he was fathered by their father's best friend, who slept with his mother in the day of her wedding. When their parents find out about their relationship, they run away and act as a normal couple until they pray at a church. Afterwards, he tries to end the relationship by leaving Iku without telling her, hoping time and space apart will cause their feelings to fade. 10 years later, he and Iku reunite and Yori states that he is still in love with Iku. (Source: Wikipedia)
A transfer student who is studying abroad from America. He is fluent in Japanese because he is an otaku. ref : http://en.wikipedia.org/wiki/Doki_Doki_School_Hours
No.3 is actually three people with one playing the role of Kortik No.3. This pig-tailed killer has a great pleasure in her kills and wants to kill Alyosha to prove she is the best. She is Alyosha's clone.
Number 96, when not in its card form, appears as a black version of Astral. Like its other counterparts, Number 96 is a malicious entity who desires the power of the other Numbers so that it may become the most powerful of them all. However, it is cunning enough to allow itself to be absorbed by Astral so that it may possess him from the inside and steal his "Numbers." It also enjoys sadistically manipulating its hosts and brutally defeating its enemies. Number 96 considers its card version to be its "other self." It also considers itself to be the "darkness" to Astral's "light." (Source: Yu-Gi-Oh Wikia)