桧山水羽
Character from the 2017 original anime [[Seiren]]. 

Has [[brown eyes]] and [[long hair|long]], [[messy hair|messy]] light [[brown hair]] tied into a [[ponytail]] with long [[sidelocks]]. She wears no cardigan, only a simple [[white shirt]] and [[necktie]].

From "the early character reveals on ANN":http://www.animenewsnetwork.com/news/2016-11-25/seiren-original-anime-reveals-3-more-cast-members-character-designs/.109183 :
[quote]
ANN said:
An "elite girls' high school swimming club member." She is in class 2-D at Sakuragawa Higashi Girls' High School, a high-class school. She is ignorant of the ways of the world. She has always attended a girls' school, so she is jealous of those who go to co-ed schools.
[/quote]

She is voiced by Izawa Shiori.
hiyama miu