K.

The person you all will hate is here now.

First.

Lol dat Infinity Sword hairstyle.

Second.

I'd say that you can EITHER manipulate/generate fire OR have absolute heat immunity. Not both. It'll bring some more interesting dimensions in regards to friendly fire of the unfriendly kind. Like, if he was immune to heat, he could just set himself on fire and go chill about, trying to hug people.