A clumsy nurse who spends her time working at a hospital in Planeptune, if she's not out on an adventure.
She's very good friends with IF and Neptune.
Compa has a knack for cooking and completing other household duties, so she often comes to the Basilicom to cook meals and help out.
She was the first to call Neptune "Nep-Nep".
In order to make Neptune eat with a smile, Compa always ends up coddling her.