Kaina is a member of the Mushikari.
Kaina is a strong and large person wearing mess up clothes and a straw hat, Kaina also has white eyes without pupils.
Kaina is shown to have a short temper backed up by his low intelligence. His temper grows if he doesn't kill another person soon.
It is unknown how or what reason, Kaina join the Mushikari.
Kaina carries around a giant hammer that he can use to split a mountain into two by swinging it.