The only thing I remember in the first book is a human girl with a white stripe on her nose, who was found by aliens on some random planet. They picked her up and took her with them. She is the only human that they know of.
She was in her teens, I don't recall her name. The marks on her nose were horizontal and just a white line. She lived in a crashed spaceship. There was a variety of aliens, like Star Wars. I'm pretty sure it wasn't Marvel or DC, and it was all in color. It was aimed at teens, I guess in the early 2000s. I know there are at least 2 books, maybe more.