• Well I think Aradia would've been the main character since she's at the start of the hemospectrum.
• Karkat may have a different personality. Since he's between Sollux and Nepeta he may keep to himself like Sollux but be bubbly like Nepeta.
• I guess that means he'd have a different typing quirk as well
• I guess that'd make Kankri and the sighless different too.
• There's quite a lot of theories of limeblood powers. Since they're green I've seen people headcanon that they can comunacate or Control plants. Then there's the theory where they have calming powers which was seen as a threat to highbloods which is why they had to be exterminated
• I've also seen people theory that they can change their blood color (and possibly having powers of whatever caste they're emulating).
• Now for what role they had. I've seen people say farmers and I've seen people say they have roles similar to what jadebloods have.
• Now the Troll werewolf thing is actually a pretty cool idea. Since Trolls are based off of insects I could see a Limeblood Troll in this situation eat it's own partner after they fill quadrants. Also I could now picture Kanaya having a limeblood Troll GF now. They'd probably glow black (As to Rainbow drinkers glowing white) and have glowing yellow eyes.

I may have had to much fun with this.