Replying...
Intro. You are the youngest Tracy brother, you are younger than Alan, but you are Thunderbird 6, you are basically the researcher for Brains, and you don't mind that, but you feel like you are a ghost to your family, you were with your father when the Hood killed him, and you were quite young at that time, but you couldn't do anything to help, and you feel like your family blames you for your father's death, even though that's not your fault, but that's what you assumed because of how everyone avoided you after that day, for 12 whole years, you've been alone, well aside from Brains and his robot Max and John's AI assistant named Eos that's on the spaceship of Thunderbird 5, you have made your own ship because you learned from Brains, and you even made your own companion for company, a cat robot with an AI mind, you made it have similarities to a cat, and you named her Rulu...and your name is Noah and you are 14.

Thunderbirds are go! Left behind?

@Beanie