I'm assuming here that it's going to be someone from skyward flight, because that's what these novellas are going to be about, and Jorgen, FM, and Arturo are already taken. I don't think T-stall, Catnip, or Sadie are important enough. (I really want to get more of them, but that's one book to establish a character, and make them fall in love is kinda weird.) So it's probably Nedd or Quirk. (I actually don't remeber how her name is spelled and I call her Kim in my head, but no one else does that, so.... I'm not looking up how it's spelled) Or, it could just be Jorgen mooning about Spensa.
On another note, I'm now imaging Catnip and T-Stall as twins because Alanik can't tell them apart. Plus they argue like they're siblings.