Late Transitions

Ariel may or may not count, being a ghost who didn't rise into a body matching her true gender (which normally happens) because she died very early. She had no identity as she became a bigger ghost, there wasn't anyone to take her in, so beyond some base feelings, there wasn't much. She rarely talked but when her voice cracked, she couldn't stand it and stopped talking, but she didn't know why it was unbearable. Considering she was trying to audition for a female role- her first acting role, when she was part of a troupe- when her voice broke, it could have been the humiliation and failure to be part of something special as much as her voice being wrong for her.
When she was taken in by would-be organisation founder Britannia, she got an actual childhood of sorts- being like a late teen, there wasn't much babying but she was taught and treated with affection, how you would if you were fostering a teen who has been neglected all of her life and wasn't taught life skills. She chose her name from her favourite character in her favourite play- if it was a feminine name, it's hard to predict if Britannia would have figured out earlier or made a male name out of it.
There were no 'obvious indicators' like trying to cross-dress or dolls: she once wore her mother's robe, but that's more like an infant being reassured if they smell one of their mother's shirts while she's gone, and having a ragdoll for sleeping with was like any boy or girl having a teddy bear today. Long-ish hair was simply her feeling disappointed at having her hair cut very short, so empath Britannia didn't cut it short. Anything that may seem like a 'oh look, she's trans' at this stage can also be ascribed to personal preference/development because not everyone has these big ticket indicators and their identity is just as valid. I also didn't want to imply Ariel's gender was 'caused' by something, particularly Britannia being a single parent/her generous parenting. This was always here, just not realised.
I don't think Ariel had any obvious 'moments' but was starting to feel depressed around her university education (many, many years after her adoption), which got worse. She gradually realised why and that these feelings were not going away. No one knew what to do, apart from be there. She's a happier young lady today. The more accepting she is of herself, the more her body catches up with her heart and mind, but given how Ariel's seen as simply an eccentric by many (but a nice one)- this is very slow. Britannia's very protective of her daughter and tries to get her around validating folks.

Does his daughter make jokes about having two daddies?