Minty

Princess turned space pirate, Minty is, appropriately, a mint green alien. She is the only child of the King.

Many are afraid of her due to her violent outbursts and her sheer strength, which only seems to double during said outbursts.
Currently, she is being tailed by a "bland and insufferably doe-eyed" young fellow who was instructed to bring her home. however, Minty is a master escape artist.
It isn't known exactly what Minty means to achieve here. 

- Minty is gay

- She considers Quill her arch-rival most of the time. Other times their squabbling is almost like siblings.