The Medaka Mermaid Quintuplets are five small young mermaids who are friends with Keimi. Their names are Ichika, Nika, Sanka, Yonka, and Yonka Two.
Yonka has pink hair and a brown-striped tail, her top is brown, and her hat is white.
The sisters have a distinctive way of speaking. Ichika starts with a regular statement. Nika follows by exclaiming the same statement. Sanka then states the opposite of the original statement. Yonka questions the original statement, and Yonka Two questions whether the original 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 and usually stay close together.
First Appearance: Chapter 608; Episode 527
(source: One Piece Wikia)
