Mee Ror-fes

A mysterious assassin.

Face of Mirror
A mythical assassin with the ability to perfectly replicate any person down to body build and voice. The only thing known about his true identity is that he appears to have an average build and wears all black clothing, dark sunglasses and a black face mask.

Season 0
For unknown reasons, when JONAH breaks into the Rokkenjima Secret Wrestling Ring (perhaps sent by him), he uses the commotion to impersonate Ushiromiya Kinzo while the real one and Gohda are busy with the intruder cartwheeling away, and tricks Ushiromiya Battler while acting as Kinzo and fighting with him.

While Battler distracts him with crying about his loss, the real Kinzo knocks him out before he can do whatever he set out to, and presumably Gohda then threw him out. In the end, Kinzo is not that bothered because he said what he was gonna say to Battler either way and fought him on the same way he would, saving him the back pain of his age.