I found a tie with a Marvel tag on the back, but have no idea who the character is on it.
Who is it?
Echoing Daft's answer, this is Sharon Ventura, AKA the She-Thing, AKA Ms. Marvel.
The picture seems to be a hand-drawn version of the frame below from She-Thing #22
Makes me think of Shadowcat.
Same mask, same darker curly hair, same color scheme. And she was mildly infamous for changing her costumes several times in the early books as the "impetuous youth" of the group.