"Groot is a friend of yours from when you were older." Which made next to no sense when she said it out loud, but that was the truth of it all really. "An accident happened to him too." Which was way easier to explain. "So now he's younger than he should be too. He looks like a small tree and is very fond of playing games." Gamora paused a moment, debating if she should continue before giving a slight clear of her throat. "You are often help him when he gets stuck on levels." She decided to add it, maybe in providing some sense of comfort.