Itsuka Yukihira

Itsuka is a young girl with medium-long usually tied-up light brown hair. She is usually seen in her Japanese waitress uniform. She lives in Nagumo's parents' house. She is ten years old at the start of the story and has been staying with the Irino family for about a year. She is recognized as the heir to the Midorimatsu family by Nagumo's father, and she herself declares that she has no intention of giving up her position as heir to the family.