Kakasan Senobi belongs to the indigenous Senobi tribe of the Kirakira Planet. She is the mother of Ojinbo, a Senobi infant who travels by hanging from a balloon, and the spouse of Ebiten Senobi.

Her family shares a significant history with the protagonist, Starzan S. They once nursed him through a fever after his rescue as a young child, an act that forged a lasting bond. Kakasan Senobi continues this connection by performing domestic duties for him during his visits, including laundering his clothes and tending to his wounds.