Mitch was a youtuber doing a 2b2t series along with Rusher. They did most episodes together. Mitch, despite being in most of Rushers 2b2t episodes, has never fought anyone major like Fit or NedaT.
In episode 18, Mitch was almost killed. He logged, and as expected, the hunter lava- and block-trapped him. Rusher had to save him once the hunter was gone.