I think they're trying to evoke something specific with that, my instinct also probably would have been Charisma.  I think what they are going for is like... terrible will and power, magic leaking out of you.  I'm kind of picturing Jean Grey in the X-Men movies, especially the unfortunate 3rd one.  It's not the force of her personality that makes her tempting and intimidating, but the force of her will.  I kind of assume that the Immolator is actually bending reality and pulling at the very strings of fire and light within a person for her effects.<br/><br/><br/>Does that sound like it makes sense?  I'm certainly not the expert on your character! ;)