Jellyneo describes Iridesia's transformation as such.
"Baelia eventually came to a realisation about themselves and became Iridesia. At this point they seemingly became nonbinary." I thought this was funny enough to share
To be fair, it does come across narratively like they chose their new name and pronouns on the spot. Like, the idea of them being trans was setup and well foreshadowed; they just went from "hmm I was really unhappy back when I was a light faerie, I wonder why" to "actually I'm nonbinary" instantly.
I think having them have moments where they look uncomfortable being referred to as she/her or even start to say something to Tavi before backing out would've helped; maybe have Baelia mention that they "even thought of a few names [themself], but they probably wouldn't do anything anyway..." to imply they've been giving the idea thought.
(Of course, this is also a consequence of the plot having too many characters, which meant Baelia was sidelined until like, just recently.)
