Character Design Idea

I've been doing a couple of sketches of my secret agent Viking and after showing my sketches to the others and one said that when she imagined a Viking to have a square jaw, and quite un kept.

She referred me to Captain America, When he went from super skinny to over muscly.

So I am now going to draw extremes from skinny to large 'as a main point in my story is, in order for him to become a secret agent he needs to put his Viking like helm on which changes his appearance (and his clothes like in "Mummies Alive"

I also have a new version of the anime "Fist of the North star" called "Fist of the blue star" which has "Kenshiro" who always very big.