this is actually kind of cute xP

I keep coming back to the this picture and wondering more and more about it, trying to guess the story behind it. Is Zeydaan an adult, and Cynthia just being a mother because her child needs her regardless of how old that child is; or is it earlier in Zeydaan's life when they still weren't used to becoming Isabella? When DID Zeydaan start transforming, and how much control do they have over it? From childhood, puberty, adulthood? It seems Zeydaan was born/laid/hatched as a male werewolf, and didn't become Isabella until later. Depending on how long they spend as purely Zeydaan, they would tend to see Zrydaan as their original identity, regardless of how magically true that might be, and either resent having to spend time as another identity, or see getting to be someone else as freedom and release. It's obvious that switching between bodies takes time and effort, but does it happen at will, or is it part of a cycle? Are they trying to change, and frustrated because they're finding it too hard; or are they trying and failing to resist? We know that Zeydaan's 'unsure of what other people would think of them', which could imply that Isabella is one of probably many 'family secrets', and any friends 'he' has probably don't know about 'her'. Hell, did Zeydaan even HAVE any friends growing up? And if they don't have good control of becoming Isabella, it's that much worse- How many times would Zeydaan have to turn down going to a party, game, or a date, due to 'having to spend all day that day, uh, cleaning the house'. What about the reverse, where Isabella is their popular public identity, with friends and a job, leaving Zeydaan a literal 'lone wolf'?

I feel a bit like I'm pestering you, and I definitely feel like I'm overanalyzing the whole thing again. I just feel certain that there could be a good story told about the events leading up to this moment.

Honestly I'm glad that people are interested. You're right about that they were hatched a werewolf (which was very confusing to their folks), there would be latent signs of the Fey Dragon side, mainly through fey weirdness and some latent magical ability. Isabella isn't really an entirely different person, they are the same person as Zeydaan in mindset (at least in canon) and I feel that after the first few times transforming where they have no control over it- and a bit of soul searching, they learn to roll with it.

I imagine it'd take some explaining to their friends- but not much at all to their family. Later on, I see it like almost a physical manifestation of their non-binary-ism, some days they feel like it's a Zeydaan day, it's an Isabella day. They're happy in both ways. Also to clarify, they tend to wear that dress as a fashion choice/job. Their father has contacts, I imagine they helped work out arrangements that help them switch between jobs on particular days.

Oh I didn't mean to imply that Isabella has a separate personality from Zeydaan, just that they might alter their mannerisms in both forms in front of people who don't know that the two are the same person and they don't think would react well to that information. So, more like Superman pretending to be weak and meek as Clark Kent, and less like Bruce Banner and Hulk being mentally as well as physically divided. A secret identity, not a split personality. Obviously, having a different appearance (and I'm guessing different voice) helps, and they wouldn't need to do it around people who already know the truth, just around people they don't trust with the truth.

I guess I'm still influenced by all the Zeydaan/Isabella works where there are mental changes as well, even if it's just becoming somewhat more effeminate and interested in cleaning/cooking.

Does the dress in this image still grow out of and around their body during the transformation like in most other versions? Because it wouldn't seem practical to put on a set of actual clothes that won't fit your current body, then transform to fit it correctly. That sounds too uncomfortable. In the 'Maiden Menagerie' story, it's just clothes, but Zeydaan's change in that canon is gradual over the course of several weeks; he presumably wore a series of uniforms that sequentially fit his transforming body better as the changes progressed until she got her typical Isabella outfit at the end. Did the dress manifest the first time Zeydaan became Isabella? I could see chaotic Fey magic whimsically, randomly deciding 'Okay kid, you WERE daddy's little guy, but now it's time to become mommy's little girl. Oh, and also a French Maid. Cause why not.". Or did the dress manifest later when Zeydaan starting to gain control over becoming Isabella, possibly as some suppressed aspect of their personality coming to the fore?

Isabella does have a different voice, but it's more the inflections and tone that changes- you could feasibly tell they're the same person if you heard them side by side. They haven't many enemies so I doubt they'd need a secret identity.

Also, funny thing is that Zeydaan is also quite fond of cooking and cleaning-

I see Fey magic being the cause of them being clothed every time they become Isabella- in this instance they're just wearing the dress. I see it almost like the way a fey manifests clothes when they become human form. Maiden menagerie is what I imagine to be the canon first instance of the transformation. From then, the dress almost became like a 'default part' of the transformed form.

Oh, when I read that story, I thought the fact that none of the other dragon girls working at the cafe reacted with surprise at Zeydaan starting to change into one of them implied that they were behind it (or maybe the cafe itself was magic/cursed or something).

I see the cafe as magical, though their transformation is more under their own power, than anything.