[ He hesitates for a breath, his quick frown betraying his uncertainty. This isn't exactly his story to tell, but here he is anyway, having to tell it. He decides to paint in broad strokes. ]

Thanos came to her planet. Killed her people. Gamora managed to escape and found a Ravager ship. I imagine the Ravager captain must have been feeling merciful that day, since he brought her aboard and escaped the massacre.

She was handed off to another Ravager captain. Aleta, I believe.

[ Well, he says "I believe," but he knows it with certainty, memorizes every story and detail and brief glimpse into her past that Gamora offers him. ]

She was raised with them, but when she received the assignment to retrieve the Orb, she left.