desperately need to do a presentation on why the Twelfth Doctors journey perfectly represents the transfem experience
their previous eleventh incarnation being suave and hypersexual (i know moffat is mostly to blame but!) is reminiscent of attempts to fit into heteronormative ideals of masculinity. whilst it is not completely insincere, there are obvious signs this does not fit you as a person, it is acted out of desperate need to being seen. as Vastra put it, eleven wore that face, and subsequently that form of masculinity, to be accepted. on becoming twelve, realising even an "idealised" masculinity does not inherently serve them, they retreated into themselves as a person for self-reflection and trying to understand why they feel so detached from who they are.
the "am i a good man" arc mirrors being closeted and having to present as something not inherently tied to your sense of self, but still wanting to be the best of your perceived gender as any failure could leave you spiralling into self-doubt about simply being like any other "man". you ignore your gender dysphoria/questioning by trying to claim a moralistic view of gendered expression. made even more clear by Twelve rejecting Clara's heroic view of them, establishing that even though they have made efforts to be a "good man", that is just a placeholder for their loss of identity.
Missy appearing as she does, who as a character serves as a parallel to The Doctor on what they could become, and her eventual arc in trying to become good is symbolic of the fear around transition regret that internalised transphobia can create when you are closeted. Missy never gives importance to their fem existence other than nonchalant jokes, rather showing a more free and expressive personality devoid of any frustration. this immediately dismisses the transphobic assumption that trans people are only focused on their gender. also, Missy representing trans femininity is inherently tied to chaos and upsetting the status quo, she is the embodiment of what society considers accepting your womanhood as someone previously labelled masculine. what many others, and The Doctor themselves, saw as a need for attention and senseless disruption is Missy not needing to serve a false version of who they are, that they can now focus on becoming whoever they want to be now without losing energy to performing a gender that society has imposed on you. Missy could never have made the decision to stand with The Doctor if she had not given importance to her own queerness.
it wasn't coincidence with meeting Bill, she was the perfect foil for The Doctor to finally let go of their anxious attachment to masculinity. i would even argue for the majority of s10, The Doctor is largely ambiguous in their gender identity and does not fit into any construction of masculinity or femininity. whilst they still present as something socially labelled as masculine, they do not internalise that gender expression. they are uncaring about and not needing the validity that comes with heteronormativity, and thus is free to finally accept the decision they have to make. as Bill says, it is so hard to let go of The Doctor, and that rings true for twelve themselves. but they begin to realise The Doctor can be anyone. yes, they are tired, it would be so easy to simply rest and not give value to who you can become. but choosing to let go of everything you once were to survive is better than oblivion. it is better to let go, to choose another lifetime where the only person that dies is your falsity, to finally get it right and choose kindness. for yourself and for those who you love. they regenerate, not just into another person, but into someone who (if only tv scripts...) can now move forward.
