Oops, commented before thinking about the purple! Well, the Lancers might work and some oddball in another unit might insist on going against type. Snord's is always an option, too.

It's a really iconic mercenary 'mech. The default is Wolf's Dragoons, the aggressively "out there" choice is Waco Rangers, and there are all kinds of great camo schemes between. I'm very partial to the 21st Centauri Lancers, though Canopian Highlanders might be a comfy choice?

Perfect

I feel like a stereotype of myself saying this, but... I took a couple of moments trying to work out how those three lined up with BattleTech factions before looking at the answer.

Honestly, I needed to look it up to be sure. No spoilers.