I've always liked the original concept of her being the cousin of the Earth-2 Superman. They both left Krypton at the same time as babies, but her ship took longer to make the journey. She was in a sort of suspended animation and aged slowly. So by the time she got to Earth, she was in her early 20s and Superman was in his 60s or 70s and retired. She was always feistier than her Earth-1 counterpart, Supergirl. Something that carries on today. The funny thing is her breast size. There's a story behind it that everyone knows by now. Every reader noticed Power Girl was much bustier than any other character out there but it wasn't until the last few years that there were references and jokes made about it in the comics themselves. Notably in a story drawn by Amanda Conner a while back. Funny stuff.
This piece is inked on 11" x 17" Canson Bristol Board. Thanks again Eric!