Michiko appears to be girly, but can change suddenly to show a boyish side. She is a hard worker. Since her last name (Endō) means "green pea" in Japanese when written with a certain kanji, others call her "Mame", which means "pea" or "bean" as well.
Michiko is a small girl with long black hair which is worn in pigtails, fixed with yellow hair ties. Her eyes are grey. Under her left one, she has a mole. As a Sakuragaoka High School student, she is usually seen wearing the school's uniform properly with dark blue socks.