Motoko Izumi is the mother of Yuu Izumi and wife of Akisada Izumi, sharing her son's accident-prone nature which leads to frequent daily misfortunes.

She is a tall adult woman with pale skin, a slim figure, shoulder-length dark purple hair often tied in a small back bun with draping bangs, and light purple eyes. She typically wears a black shirt.

Motoko possesses a caring and supportive personality, deeply worrying about her son while consistently backing him. Initially, she experiences extreme nervousness around women her own age due to lacking prior female friendships. This social anxiety lessens as she develops a friendship with Miyabi Shikimori, mother of her son's girlfriend Micchon Shikimori, eventually allowing her to converse easily with Miyabi. Her long-standing desire for a "mom-friend" is fulfilled through this bond with Miyabi.

She forms a close relationship with Micchon Shikimori, treating her like a daughter and displaying playful jealousy over her son's relationship with Micchon, a dynamic that recurs in their interactions. Her klutzy nature is a consistent trait, aligning with the family's shared misfortune.