Technoblade is a typically gruff and cold kind of person. He really doesn't trust you at all. It takes a lot to crack his shell, preferably a few gold trinkets. The only way you can tell is if he begins gifting small golden items to you. 
He wears a boar skull as a mask, but you can still see his medium sized tusks underneath. His eyes are a deep, blood red. He's typically dressed in very royal-like outfits, sporting a thick red cloak and a blouse, his belt littered with potions and small items.