Mahiru Koizumi

Mahiru is a sensible and optimistic girl who is generally rather calm and unafraid to speak her mind. She initially comes off as confident but is later revealed to have self-esteem issues. It is evidenced by her constant comparing of her photographs to those of her mother, a famous war photographer whose career led her to be absent from home for much of Mahiru's life. However, she finds it frustrating since others too always compare her style to her mother's, and that despite her love for photography, she feels her title is stupid compared to others. Meanwhile, unlike her successful mother, her father was a very poor parent, leaving the responsibility of the housework entirely to her. When she scolds someone, they may liken it to being yelled at by one's mom.

Mahiru has high expectations of men and is quick to be abrasive towards them. She is much more tolerant and friendly to girls, referring to them with their first name and "-chan" honorifics, while she refers the guys casually with their last name only. The subjects of her photos are usually of girls and explains that she easily gets bored of photographing guys. She loves taking photos of people's smiles, liking to record everything of a certain place so that her friends will not forget it.

Mahiru is also known for being protective, loving, and incredibly tolerant, especially towards girls, and since she is so tolerant, she becomes close friends with them despite the fact that some of them have terrible manners most of the time, though she does scold them occasionally for making disrespectful comments.

Mahiru wants to help as many people as she can, but it'd be a mistake to call her a pushover. She doesn't hesitate to scold those who are rude to her and is also really good at taking care of people although never failing to complain about it. She's also a highly empathetic person even caring about those who treated her poorly.