NHF – new heroes for Heroes V 3.1.

Understood, so it should just be an old man with a beard?!

Theoretically, yes.

By the way, does he have horns on his fur hat?!

It's not fully visible, but it looks very much like the "horns" that adorn samurai helmets.

And also, if he's a monk, what do you think about whether or not he should have a hood?!

In my opinion, Heligrin is a former monk of Hashima, i.e., more of an eastern type than a western one (similar to the heroes of the Sanctuary from part 6).