In the Anime Seira has long straight black hair with a mask on the right side of her head, she is usually seen wearing her school uniform.
Seira has a kind personality like her sister Megumi, but at some times she can be ruthless. For example, Seira stipulated that Mori would be fired if she lost a to Kyōya's hair brushing technique. While outwardly kind, Seira speaks her true thoughts through her mask using ventriloquism. Only a few people can hear her when she does this, including Kyōya and Mao.
Megumi Amatsuka : Megumi is the second eldest sister to Seira. Seira is quite over protective of Megumi too, just like she is for Mao, she has used aura to scare Kyōya aswell.
Kasumi Shinomiya : Kasumi and Seira are friends, how they met is unknown.
Geraldine Bernstein : Geraldine and Seira are friends, how they met is unknown.
Other GJ-BU peopleEdit
Kyōya Shinomiya : Seira dislikes Kyōya in a weird way, her mask will scare Kyōya nearly when ever she sees him with Mao or Megumi.
- Main article: Seira Amatsuka/Relationships.
- Her mask has an aura that attacks Kyoya whenever he is near one of Seiras sisters
- Main article: Seira Amatsuka/Image gallery.