A Strange girl with unique values,
who is living next door.
Mashiro is the same age as the protagonist and is working as a waitress in the boat restaurant Leviathan.
Although reticent by nature, she knows how to talk to people. She is an indoor person, with her hobbies consisting of things
like gaming and watching TV. Mashiro is satisfied with her current life, but her first love becomes an impetus for change.