I never thought I would find myself favin this song when i first found it...its catchy. The Terminator 2 reference with Rockman near the beginning totally sold the video. 

Found this fanart of roll on a Japnese website. I think the look is good. makes her less child-ish and alot tougher. I REALLY LIKE THIS PIC. Hope you do too.

Artist Website KENZYのモンハン生活: 初ウカム