|Physical and Vital Statistics|
|Manga||Volume 1 Chapter 1|
Marin Tachibana is a friend of Erika. She is currently dating a guy call Atsu. Atsu has a orange brown hair which is straight. She becomes one of Erika's good friends but is Tezuka's best friend.
She is a funny loud and committed girl towards her friends and boyfriend and just like Tezuka enjoys boasting about her boyfriend and the things he does for her or the things they do together or what she encounters when having sex with Atsu. Her boyfriend Atsu apparently looks like a model. However deep down they both love each other and she is happy with him. She loves Atsu even more after seeing Erika and Kyouya's relationship. She also enjoys eating a lot.