Asumi Nakada

Himawari was saved by a ninja when she was little, and has wanted to be a ninja ever since. On her first day at ninja school she meets Hayato, a non-ninja teaching to pay off his debts. Interestingly, he has the same mark on his neck as the ninja who saved her.

As one of the seven mermaid princesses, Lucia must travel to the human world to protect the mermaid kingdoms.