A character type for a Star Trek game

[Astromancer]

I might have a chance to get in on a GURPS campaign useing the setting of ST:OS about ten years after the events of the third season of Star Trek. Mind you the films aren't the future of this campaign, some features of later series are in this continuity, but few of them.

I'm looking for advice on my PC. I've chosen to play one of the eugenically enhanced humans that travelled with Khan on the Botany Bay. This individual when the announcement was made that the Botany Bay's crew was going to be settled on a wild planet asked to speak to those in authority away from the others. Kirk agreed to listen to him. Aidan explained he was unwilling to follow Khan any further, he'd been forced and blackmailed earlier, and he'd be willing to face prison, but he wasn't willing to stay with Khan. And then he asked for a hearing as an American citizen.

Kirk and Spock, once they except that Aidan is willing to face rehabilitation camp, and because he is younger than the other members of Khan's crew (mid-20s) agree to let Aidan face the law. Aidan does send time in prison, but is released early. Because Aidan is the only one of the genetic supermen who can be studied and Aidan has Psi ability (all PCs in this campaign have psi), Aiden is sent to the Vulcan Science Academy. Although Aidan isn't realy suited to the company, he excells at his studies and develops two Psionic abilities. First he develops a powerful mental shield he can extend to protect others. Second he gains the Empathy merit as a psi power.

Aidan convinces the Vulcans that he's better suited to starfleet and gets them to recomend him to StarFleet Academy. At the start of the campaign Aiden is a man in his mid-30's just starting out as a starfleet ensign.

Here's what I wanted help with.

First, how would this crowd advise building a mental shield that can defend a group so as to have that Star Trek flavor?

Second, what should Aidan's stats be? Khan must have had a GURPS ST of 22 or a little better. Aidan is clearly much stronger than a normal human, but what would fit? Similarly, his other stats are impressively high, what would fit the eugenic supermen, and the fact that Aiden is one of that group?

Third, Aidan's upbringing was confused. His parents died young and his older sisters (followers of Khan's) took charge of him. Aidan never admired Khan, but he was loyal to his family. The last of his sisters died in one of the failed life-support units on the Botany Bay. Aidan is defensive about how his education was interrupted (he left school at age 13 with the equivelent of his first year of college) and doesn't get back to school until the Vulcan Science Academy. Similarly, his social development has been derailed by his life. How do you represent this in GURPS?

Fourth, what social stigmas does Aidan face in being one of the "Supermen" of the Eugenics Wars?

Thank-you for your help.