Marin is extravagant, messy, and while quite mature, she's also clumsy. She is massive otaku and a passionate cosplayer. She is very kind, friendly, cheerful, open-minded and outgoing, is considerate of others and is very helpful towards Wakana, wanting him to stand up for himself. She is bold and confident, but also a bit scatterbrained, being impractical and unskilled at handiwork. She's also not very good at cooking.