In real life, some female rulers retained the masculine titles. Speculatively speaking, Miko's case resembles Saber's (under the guise of a man). Even Sanae thought Shoutoku was a male.
Thanks Moonspeaker, may you rest in peace... ... ... no, thats not what I'm talking about.
This, might be unrelated but: Is Miko a female, or male? Why shes being called "Crown Prince"
As someone has said it, Miko is definately a woman, in Touhou at least. She is called the Crown Prince because that sounds cooler I guess
FlapScribbleSkritchSkritchShripSince arriving here in Gensokyo, I have interacted with all manner of people. Yesterday, I was taken along by the Chief Maid of the western-style mansion to a place called "karaoke". When we opened the door, there were dozens of totally naked women lying in wait for us, breathing roughly. Within seconds, all my clothing was stripped away. The end of the Chief Maid's soft, heat-filled tongue crawled over the tips of my breasts. With that as a start, the women rushed upon and violated my body like starving beasts. Naturally, I did not resist, for this was what I had hoped for in coming here. At length, ISince arriving here in Gensokyo, I have interacted with all manner of people. Yesterday, I was taken along by the Chief Maid of the western-style mansion to a place called "karaoke". I spoke, ate snacks, sang and generally had a good time with many women. It was truly a full and enriching time, and I would like to go again.