well doomguy is also kind of a nerd, we can see in the fortress of doom he reads a lot of comic books and has a gamer pc, we can only assume that doomguy watches anime he went into the divinity machine and was blessed with the power of god so, doomguy, (quite literally) has the power of god and anime on his side
not necessarily, i read comics and own a gaming pc and i do not watch anime. it would not be out of character for doomguy to watch anime but we can't tell just from what's in his room
I get the fact ultrakill has loads of dmc references but can we just talk about how Gabriel has two katanas and literally acts like Vergil ? Not only that but the spinning blades is a nice nod to Vergil