Seira Kokubyakuin (黒白院 清羅,Kokubyakuin Seira?) is the student council president and is one of the people of the group, "Popular Five". She is one of the few people who knows about Kanade's curse, "Absolute Choice". It is heavily implied that she is connected to the Gods as she mentions them to Kanade at one point.
Seira is a beautiful girl with fair skin. She has long, silver-grey hair that reaches below her knee and has long bangs that frame her face. She also wears two small purple flowers on top of her head. She is usually seen wearing the standard girl's uniform.
Equivalent to her beautiful appearance, Seira always speaks in a polite manner and often acts like a proper lady would do. Most of the time, she will properly addresses other people with "-san" .
Seira also always shown to smile for most of the time, but seems to hide her true feelings from everyone. She has a rather mischievous side as while she knows about Kanade's curse, "Absolute Choice" and it seems like she's helping him out sometimes, she usually chooses to make fun of him with the curse instead (which at one point further ruined his reputation).