Seteth's voice actor from Three Houses is voicing fan made memes on Twitter

SteelBeast6Beets · Aug 9, 2019

Ravelle said:
First Dio memes and now Seteth memes, guy can't catch a break. ;p

edit; thought this was the JP voice actor, not the english one.

Timodus said:
Based on the title I was hoping it was Takehito Koyasu, but I guess not.

I've never heard of any profesional JP VA participating on a fan work. I can only assume there's some guideline that forbidden them from doing so.