Rayner: Purple, green, and black; slender build, confident pose... I'm definitely looking forward to seeing whether the snark is good-natured.
Siyan: Hair looks like she's a relation to Osiria (half-sister or cousin?) Siyan's quote sounds formal and almost subservient so maybe she's in a support position for the Sterling family? But we know Osiria is a Sterling... It'd seem unusual to have family serving family, but with her outfit matching Reiyd's it's got to be a uniform of some sort. Hmmm.
Reiyd: From the direction his nose and chin are facing, he seems to have a bit of a case of sidemouth. Maybe shorten and scoot it to the viewer's left?
Same outfit as Siyan; associated with "the House of Sterling?" Also like her his unusual hair and eye colors match.
Oooh, is he Puppy Butler? I've been hoping we eventually get to see Osiria's puppy-butler, but I can't remember his name.
Anabelle: I like the partially-swept-back look of her hair! Hmm, the style of her eyes is much more like Em's (and perhaps Maia's?) than anyone else's. Is that significant?
The way she makes a suit jacket look so casual and... comfy? lived-in?... makes me really interested to learn about her personality.
Is she a large/sturdy woman or is her sprite more of a close-up? (Curiosity, not critique.)
Kaye: His outfit is charming. Seriously, the way you've textured the neckerchief, gem, and rose... he is fine, and I'm not just saying that because I'm a sucker for formalwear. (Though I totally am.) Since he's Keeper Inc related, the white pattern on the lapels must be meant to invoke Kippy-wings, yes? Nice. What is the wrapped thing showing behind his arm?