Ami Onuki and Yumi Yoshimura

Ami Onuki and Yumi Yoshimura are the two titular heroines of Hi Hi Puffy AmiYumi. They are based on the real-life Japanese pop duo Puffy AmiYumi, but with exaggerated personalities. Ami is peppy, optimistic, and cute, while Yumi is cynical, sarcastic, tough, and tomboyish.

Appearances in Swimwear
Ami's swimsuit is a teal bikini, which can be found in the episodes "Robo-Pop", "Surf's Up", "Helping Hand", "Time Off", and "Gridiron Maidens". Her top has a heart in the center.

Yumi's most known swimsuit is a purple bikini, found in "Surf's Up", "Helping Hand", "Yumi Goes Solo!", "Record Breakers", and "Record Breakers" Her top has a skull on it and her bottom has three yellow squares at the top. She also wears a camo bikini in the episode "Robo-Pop".

In one episode, both are seen using Hula-Hula suits.

Yumi also appeared in the nude in the episode "Neat Freak" and Ami was seen in a towel in "Helping Hand".