egg magical girl where she's like "man, i wish i could be a girl all the time, this is so fun! sucks im a guy the rest of the time when im not in uniform."
her name is like. sparkle sparkle sunshine and she's so insanely miserable in her day to day life. her teammates, sparkle sparkle moonlight, sparkle sparkle loveheart and sparkle sparkle stardust don't know she's a "guy" and she's mortified of them finding out. so while the three of them hang out outside of uniform, she isolates herself.
her whole thing is fighting darkness with the Truth and her "sparkle friend" is a little sun shaped lion thing named beam who's incapable of telling lies, which puts a lot of pressure on her. she keeps telling herself and beam that she'll tell her teammates eventually, but... not right now.
sparkle sparkle transgenderism
the hatching starts when beam offhand mentions she's a girl and she's like "but you can't lie??"
YOU GET EXACTLY WHAT I WAS GOING FOR THERE