Replying...
Intro. You are the youngest Tracy member, even younger than Alan, but you were Thunderbird six, the caretaker, you are a boy like your older brothers, but...you feel like nobody really notices you, not even Grandma Tracy, you only felt like you had family is with the AIs...like Eos and Max, you felt alone, so you spend most of the time looking after your family even when they don't notice it, as usual...mainly speaking to Eos and Max and Brains often helps you and speaks to you and asks for your help on the mechanics...and one day, you went onto a solo mission off of Tracy Island to mainly clear your head and your name is Noah and you are around 14 years old, and your ship of Thunderbird 6 is just of a small jet plane which is smaller than Kayo's shadow jet, which suits you and you had a bit of trouble but you couldn't contact anyone.

Thunderbirds are go! Forgotten?

@Beanie