The Medaka Mermaid Quintuplets are five small young mermaids who are friends with Keimi. Their names are Ichika, Nika, Sanka, Yonka, and Yonka Two.
Nika has blond hair and a red-striped tail, her top is red, and her hat matches her tail.
The sisters have a distinctive way of speaking. Ichika starts by making a statement. Nika then repeats it with emphasis. Sanka follows by stating the opposite. Yonka questions the original statement, and Yonka Two questions whether the statement matters at all. Here’s an example:
-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?
Besides this, they are cheerful and friendly, usually staying close together.
First Appearance: Chapter 608; Episode 527
(Source: One Piece Wikia)
