To be fair, I haven't seen many of them. They exist, but I don't think they tend to be very successful in the West; there's a market for martial arts steeped in mystical fluff, but the Omoto-kyo Shintoism that the more esoteric aikido branches are rooted in is deeply weird even by Japanese standards, and it doesn't fit particularly well with the watered-down holism-and-wellness narrative that Western students who're so inclined tend to expect.
The branch of aikido I'm most familiar with is Yoshinkan, which is one of the earlier, harder ones.
Interesting. I looked up Omoto-kyo and it seems I have underestimated its weirdness. Zamenhof as a kami is an... unusual idea :-/
But returning full circle, it doesn't seem wise for a girl who sees spirits to start a practice the mystical bits of which involve possession by spirits...
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.