Sorta like "landmark characters" I get it. People who are just sort of associated with wherever it is they happen to live… kinda like Aergar already in a way. I've been thinking, since the fae are so creative and diverse in their interests, there's probably a lot of different subcultures among them. Perhaps some of them have an affinity for being small fairies while others are taller than the average human, since they can alter their appearances there could be clans that exist that all share a common trait like feathers or a tail or simply a color scheme. Just throwing that in there for a bit of ambience.
I am kind of wondering if the gypsies are a separate race or if they're like deviants from other races who've come together, interbred to create something like a new ethnicity or culture with nomadic tendencies. Excluding Ada though, because I think she's something else entirely, at least that's what Balthazar has alluded to.
I am personally a big fan of unicorns, but I will be uncompromising in my insistence that they be "dictionary definition" by which I mean Webster's definition of a unicorn as "a fantastic creature with the head neck and body of a horse, legs of a deer, and tail of a lion, with a horn growing from its forehead". But really, anything that's not the stereotypical horse with a horn. Unicorns are not horses, they are their own species and in this world it's cool if they're big, small, different colors, have more than one horns or differently shaped horns just as long as they're not horses.
That being said, I think a unicorn character would be interesting. A landmark character known for inhabiting some place in the north, maybe by the sea. Another good one might be a dragon who lives in the Jairo Mountains, guarding his hoard of treasure (that's not too cliché is it?) or maybe he just lives there, maybe he's an ice dragon that keeps the snowcaps on the highest mountains. I'd be game to come up with some lore.