Rin

A priestess of a mysterious shrine said to have been built by people who moved to the village a long time ago from overseas. She knows both Ion and Petako and seems to take care of them. She's much stronger than she looks. And yes, her punches are incredibly painful.

It is hypothesized that since she is a priestess, she can become possessed by her shrine's deity. It's like she has two completely different personalities!

Spoiler

She is Ion's cousin.