I think that is a trope in its own right.

Introducing, yellow ppolka dot team. Team member special abilities:

1. can fly anything
2. good at sneaking
3. can put his hand around his elbow
4. knows the names of all the Angels from Captain Scarlet

I can do one of those four. Guess which?

Here's a clue: that special ability got be ostracised by nerds for being too far beyond the pale.

So guys...

What's your long lost Spartan team?

• team colour?
• team member special abilities?
• "interesting" character quirks?
• reason for us not having heard of them before?

: Actually, I would like to see more of the latter. Like, say, what happens
: when a Spartan IV retires? You have a superhuman veteran with
: God-knows-what-health issues, and her augments are classified. How hard
: does life suck for her when the only doctor she can visit is a VA official
: with Top Secret clearance?

S4s are just soldiers, they aren't super bright like wot S2s are. I imagine they would be snapped up as personal security. I doubt that their augmentations could be decommissioned before discharge.