Setsuna Yamaguchi

"'I'm not totally sure what's going on here.' — Setsuna"Setsuna Yamaguchi  ( 山口せつな, Yamaguchi Setsuna) is a meek second-year student at Shujinko High School. She is typically dubbed as the “foreigner” of the group for her looks and inability to fully grasp the Japanese language.

Appearance
Setsuna has long, wavy, brown hair that fades into orange at the tips. She typically ties a portion into a small ponytail at the back of her crown. Her bangs are swept to the right. Her eyes are bright blue. Although she is short, Setsuna has an athletic build. Setsuna is usually mistaken for being a foreigner because of her looks.

Setsuna usually wears the complete female uniform of Shujinko High School: the jacket, shirt, vest, tie, tie clip, and skirt. She also wears black knee-length socks and compression shorts under her skirt. Outside of school, Setsuna prefers bright, comfy clothing that includes jumpers and shorts.

Abilities
Setsuna has the capacity to take on the form and abilities of cervids, especially of deer. The most common application of this ability is the protrusion of antlers, which appear when Setsuna becomes flustered. Although rare, she can also completely transform into a deer, after which she loses all human features such as speaking. Transformations are not usually intentional and can last up to several days if not triggered back. Setsuna is also known to have enhanced agility, speed, hearing, and night-vision.

Personality
Setsuna is meek and polite initially, but warm towards friends. She isn't the sharpest tool in the shed, as she blanks out on schoolwork and often gets lost in conversation. Setsuna is conscious of her flaws and gets flustered when they're exposed. She does her best regardless and is an optimistic go-getter.

Setsuna's infatuation with athleticism combined with her ability allows her to pursue sports at school, namely track and basketball. She is enlisted to be part of several teams, but no one seems to believe that she actually is in one.

Michi Murasaki
Setsuna and Michi, along with Hisa, are peers of class 2-B. Setsuna sits behind Michi in class, and they frequently spend lunch together. Michi develops a crush on Setsuna, who is largely oblivious to the fact. Setsuna isn't fond of Michi's excessive skinship, but doesn't completely reject her advances. Setsuna is often relieved of being the flashiest person in the room due to Michi being flashier than she is.

Shun Kimura
Setsuna and Shun become fast friends shortly after being introduced. The two often hang out or play video games together in Shun's room, where Setsuna learns to secretly enter through a window. Shun frequently puts himself in a parental role, exaggerating his desire to protect Setsuna from other men. When Shun learns of Setsuna's crush on his friend Toshi, he plays matchmaker.

Toshi Nakashima
Toshi becomes Setsuna's DREAM tutor after a swap. Setsuna starts to crush heavily on him after a few key interactions, but Toshi either doesn't notice or doesn't think too much of it.

Family
Setsuna is very close with her mother, whom she affectionally calls "mama". Her mother constantly worries for Setsuna's health and success, as it is revealed she was against Setsuna's enrolment into Shujinko High School. After being asked about her ability, her mother says that Setsuna inherited it from her father. Not much is known about the family patriarch, aside from the fact that he is estranged and Setsuna physically takes after him.

Background
Prior to transferring to Kobe from Kyoto, Setsuna lived a relatively normal life with her mother. She would not discover her ability until after enrolling into Shujinko, especially as her father was always away from the family.

Trivia

 * Setsuna mentions that her father once took her to an overseas doctor, where she was diagnosed with dyslexia.
 * Setsuna likes collecting cute-looking merchandise.
 * Setsuna frequently plays video games. Her top picks are Animal Crossing: New Leaf and Love Live!: School Idol Festival.
 * Setsuna has an iPhone. Her phone case is green with cat ears and a white stripe, which has her name printed on it.
 * Setsuna's favorite animals are cats.