Umine

Umine (海音 Umine) is one of the characters in Koisome Momiji and is depicted as one of Shōta's friends.

Personality
Umine is a very upfront friend of Shōta's, and is often portrayed as someone who is able to say whatever she wants. She is very obnoxious at times as well. Regardless of these qualities, she can be also described as someone who is kind and caring, which is evident in the interactions between her and Yui. She also very helpful towards her friends, although her ways of doing so can be rather mean and impulsive.

Trivia
The kanji for Umine's name means sea (for Umi, 海) and sound/noise (for ne, 音)