This is Preston (Mimic) and he's a foxtrot team member. He mimics other's powers and has some telepathic energy-related abilities. He's an ex-soldier and super disciplined, but very cordial and respectful. They might work together on missions (he's new to the Ghost Corps but had been in the UK equivalent since 2009).
I dunno. I think he'd just... really like Xander! Let me know if you're down for something.