Rika is a sweet and hyperactive Numan who was raised by the sentient computer Seed. Made from the mold of Nei, from Phantasy Star II, she has a few feline traits along with her humanoid body, and is one of Chaz' best friends in the game.

DL-wise, she is a very well-rounded and dangerous combatant. She is very fast and has accurate instant death with Eliminat. Failing that, she has many stat-buffing spells and powerful healing to stay in the fray for a long time while she claws at her enemy non-stop. Her only true drawback is her middling magical defense.

Her sheer versatility in combat has twice made for big success stories in the arena, as she was first a Heavy champion in Season 13, then a Godlike finalist twenty seasons later.