The Medaka Mermaid Quintuplets are five tiny mermaids who hang out with Keimi. They're Ichika, Nika, Sanka, Yonka, and Yonka Two—basically sisters who are pretty much inseparable and always in a good mood.
Ichika's the redhead of the group, sporting a green-striped tail with a white top and a cute green hat covered in white polka dots.
What makes these five instantly recognizable is their weird, call-and-response speech pattern. Ichika kicks things off with a straightforward statement, Nika echoes it back but louder and more excited, Sanka flips it on its head with the opposite take, Yonka throws doubt on the whole thing by saying "maybe," and Yonka Two wraps it up by asking if any of it even matters. It's like a coordinated routine they've perfected:
—Ichika: Luffy is a pirate.
—Nika: Luffy is a pirate!
—Sanka: Luffy isn't a pirate.
—Yonka: Luffy might be a pirate.
—Yonka Two: So what if Luffy's a pirate?
Beyond the bit, they're just genuinely cheerful and friendly kids who stick together everywhere they go.
First Appearance: Chapter 608; Episode 527
Content compiled by AnimeList.moe from publicly available sources.
