This is all incredible work. I never played any of the Wing Commander games, but this strikes me as being akin to the re-imagining of Battlestar Galactica. You seem to have built from the original aesthetic but given it your own character. I also love how grounded everything looks. I'm a fan of realistic-looking sci-fi (especially if it has a 70s vibe) and this is right up my street!
Angel's helmet looks great. I'd love to see decorated helmets for all the characters.
One suggestion I have about the helmets is that it might be worth having a "helmet hair" version of the models. I feel like you wouldn't see as much hair on their foreheads with the helmets on, as they'd be pulling the hair back. I'd also love to see Chef blink in that animation, but I have no idea how easy would be to do.