What do you think a Rogue of Heart could be like?
Nepeta! She’s a good example of some Roguish things, from isolation from society, disregarding the Hemospectrum and living in a Cave hunting her prey kinda savage-like, to loving her friends, having what’s become the staple Moirailship of the series, as well as being close to a bunch of other Trolls in the Meteor. It also shows through how much of a Heart Player she is by having a Shipping Wall and keeping track of everyone’s relationships.
And although we never saw her actually use her powers, since she didn’t ascend, Nepeta would be terrifying at full power, because that’s what we needed, making the Apex Predator even more terrifying. I’ve argued in the past that a Rogue of Heart would be able to steal people’s Souls and switch them around, pulling off Bodyswaps and the like, but she could likely straight up tear someone’s Soul out in a similar way to Dirk with Aranea. I can sort of imagine her claws glowing with pink crackles as she slashes through someone, and rather than blood or a physical wound you just see their Soul being yanked back and torn from their body.
Stealing Heart has also romantic connotations, being able to Steal Romance and Distribute it somewhat sounds like a Shippy Catgirl doesn’t it? Except being made into a physical power, she’d likely be able to make all of her Ships real, breaking relationships around and pairing them how she thinks they would fit better. Taking away parts of personalities she doesn’t agree with and tweaking the way someone acts wouldn’t be out of the question either. Arguably, too, they may be one of the few things able to separate a Prototyped Sprite into its components, and I once theorized she, or Davepeta, could have actually separated Caliborn’s Soul in Lord English from the rest of Souls.