[@Thecrash20]
Pretty good sheet. Love the demon flavor, just have a few suggestions.

One, demons are generally weak to silver (among other magical beings.) Since he has a human host this weakness only 'dampens' some of his demon-related abilities, and silver weapons may bypass his durability (Granted he isn't completely vulnerable to the material, as a beef nugget I expect him to tank such injuries regardless.)

Two, I don't really see any artifacts gifted from Lancelot. If you wanted me to come up with one thats fine, but just to note that an artifact could just be a ring that does nothing, or some really useful enchantment.

Three, his bio should include how he was recruited by Lancelot (Which can be something as measily as a message from a talking crow) as well as why exactly he wanted to join/motivations for joining.

With that out of the way, with what you have provided me I suggest his role to be a Conqueror. He has the power to easily take over poorly defended cities and armies that aren't well equipped with dealing with such a monstrous foe. His missions will mostly be solitary journeys to demolish cities or outposts of various factions, but may be involved in a team based assault against higher tier enemies as well.