Removed the Kamina tag. That's not Kamina; the hair's wrong, the shades are wrong, and there's no tattoos.

That would be the Beastman from the episode where Yoko saves the boy from the tree and the girl from the lighthouse. They take the girl hostage and demand for food before getting taught a lesson by Yoko.
A very keen eye for someone who only had a few seconds of screentime (not counting their ganmen).

But that guy was probably a little joke the studio played with about all the "kamina imitators" after Kamina steals the first Ganmen. Low and behold, there is a beastman who looks quite like Kamina.

Hey, the more you know...