I got it

[Zytel]

Holy crap! How did we not see this sooner?

The name "Helltaker".

It was a question to the main character "what will he do with the demon girl?" and the answer was "he'll take her".

He'll take her.
Hell take 'er.
Helltaker.

It was so obvious! I am a genius.

Well, a six years later genius, but still. 😆