How would the classes of heir, rogue, and sylph interlope with the aspect of mind? Mind is a really interesting aspect to me.

Of these, the only I’ve not answered is the Heir of Mind, and they sound like someone that’d change their mind quite a bunch! Their decisions would be constantly influenced by others and their surroundings, and at the same time they’d influence those around them. They’d also likely present themselves differently to different people, to try to get along with them, or just because who they are passively sort of changes depending on who they are with!

For powers themselves, Changing the Mind sounds like Thought Manipulation, perhaps sending intrusive thoughts and not letting whoever they’re against get the upper hand. Making a Third Choice sort of like what John Did could be possible- Adding new points of view or opportunities to do things differently and not necessarily get stuck down a single road. General Psychic Powers could be a thing too.