>>16246935I can't tell on Twitch since the site deletes older VODs, but he always uses the VTuber model on every archived stream there.
On YouTube, his oldest videos use a Minecraft model rigged like a VTuber model. From his newer videos, it looks like he records while having an actual VTuber model rigged, but it's hidden most of the time, with it only being shown during reaction moments, along with PNGs of his character.