>>49675974The whole "Miko is trans" thing buries a much more interesting thing under it for those willing to really dig.
Let's start with the fact that the historical Shoutoku Taishi was a strong advocate of Buddhism. There's an extremely beloved and popular Buddhist deity known in Japan as Kannon. She's commonly thought as being female, but is also portrayed in androgynous and male forms. In Buddhist doctrine, Kannon has no single gender because Kannon, like all the bodhisattvas, transcend limitations on the forms they manifest as.
Shoutoku Taishi established a temple known as Horyu-ji. Today, in this temple is a hexagonal structure known as the Hall of Dreams, built on the grounds of Shoutoku Taishi's personal palace. The Hall of Dreams is named so because a golden buddha one appeared to Shoutoku Taishi in his dreams. In this Hall of Dreams is the Kuze or Guze Kannon, a sculpture of Kannon that was created in the likeness of Shoutoku Taishi after his death, when a cult had developed around him. Some say this was made out of belief that Shoutoku Taishi was a manifestation of Kannon, others claim it was to pacify and bind his angry ghost, angered by the termination of his bloodline.
What of it? Well, before Kannon arrived to Japan, she was Guanyin in China, and before that, Avalokiteshvara in India. Avalokiteshvara was a decidedly male deity, yet while migrating eastward he became portrayed in increasingly feminine forms.
By creating the Kuze Kannon - who is referenced in Miko's spellcard "Halo of Kuze Kannon" - the historical Shoutoku Taishi became intermingled with a deity that historicaly acquired more feminine characteristics over time. In Touhou, it is pretty much said out straight that Miko is not the historical Shoutoku Taishi, but a manifestation of his legend, a legend that is also in real life tied with the feminine Kannon.
Miko is something much more interesting and smarter than a transition story of the MtF kind.
How ZUN came to make such a cynical depiction so tied with Taoism is something I haven't been able to decipher yet, but Shoutoku Taishi was very much into other Chinese strands of thought too, even if Buddhism was his primary driver.