Complications
(1)Quirk Nathaniel's memory for the past year is just... gone
(2)Prejudice Whenever Nathan exerts his powers, a great roar of hot, bone-dry air accompanies his magic, as does the scent of sulfur, each growing stronger and louder as he increases his effort using his spells. With his mightiest abilities, the roar may even sound like screams coming from a great distance away...
(3)Quirk While exerting his powers, it seems like Nathan's tattoos can occasionally move to different locations on his body or even change their shape and color.
(4)Quirk The slightest tinge of brimstone clings to Nathan, much like a subtle cologne or the scent of sweat might stick to others.
(5)Power Loss Nathan needs to be able to move his arms to use his spells; these are not precise movements, but rather broad ones; he can still cast if his fingers are numb or the like, but if cannot have at least the majority of his motion in his arms he cannot cast.
Motivation
Nathan is a genuinely good person and likes to help people, though he will be the first to admit that he finds superpowers to be outright cool. He's not quite sure why he always seems to smell like sulfur though.