Freshman when the story starts, "second prettiest girl in class" as called by classmates, 16 as of when the story starts, black hair that goes stops at her shoulders, red eyes, best friends with yuu amami, Umi transferred from tachibana girls middle school, an all girls middle school so freshman year is a first in a mixed school, is popular in class but is more quiet then yuu, Umi is pretty cheerful and lively but not to the extent of yuu since Umi isn't loud and she normally just does playful teasing, Umi takes care of yuu in ways but she can also be playful too and isn't afraid to do it in public, although umi's life hasn't always been good since in the past in tachibana girls middle school she suffered with fake friends since she's always been compared to yuu and once hated yuu since any friends Umi made would move to yuu and stop hanging out with Umi, but that is in the past since Umi has confronted this to yuu already and they made up, although Umi also has a secret side where she likes gaming, watching movies and eating fast food which makes her have the same interests for a lot of things with maki which has sparked up a secret friendship and eventually a relationship, there are a limited amount of people who actually know of Umi and makis relationships being their families, themselves and yuu, Umi can also be sweet but outside of maki others barely see that side of her, Umi also has a spare key to maki's apartment, Umi usually places in the teens in rankings of the whole school for tests and single digits of the whole school if she's trying

Freshman when the story starts, "prettiest girl in class" as of how the students call her, 16 as of when the story starts, long blonde hair, blue eyes, best friends with Umi asanagi, Yuu transferred from tachibana girls middle school, a all girls school so freshman year is her first year in a mixed school, is popular in class and is normally pretty loud and blunt with things and super playful but is also oblivious to a lot of things, Yuu knows Umi is dating Maki