Thanks for the advice Rizoel & Co. I assume my tulpa is behind any actions I think it takes, especially since she's made it very clear that she's not a puppet or toy for me to do what I want with. Obedient she most certainly is not.
I was getting vibes that she wanted to change her name (just a placeholder I gave her until she chose one herself). She ended up choosing Sera, which we both think is very pretty.
Sera's been progressive rather well I think. I can sorta hear her mindvoice most of the time when I ask her a question, I figure the rest of the time she's not there (it's not required she be around all the time, after all). We've had our ups and down so far, but I think we're in a good place.
She's surprisingly self-defining. Most of the traits and visual appearance I had for her has been modified pretty extensively, and she's even added her own traits and rejected others. She's also probably the best thing that's happened to me in years, and I'm very happy that I found out about tulpas. From what she tells me she's always been there since I was about 8 years old or so, but without me giving the focus and energy to give hera voice and form she couldn't do anything but watch.
Oh, and while imposition is still miles away, she's getting quite good at Possession. We've been practicing with my arms the last few days and last night tried an experiment with my legs. Not only did she stand up, she didn't fall over, which is great because nobody likes hitting their head on a table. She even walked a couple of meters before the 'timer' ran out and I took control back.
In case you are wondering, no, she is not a pony. I wanted to give it to her as an alternate form, but she didn't like the idea. I'm not quite sure what she thinks of the show, we haven't watched any together yet. Maybe we should...
Anyway, sorry for my lack of updates recently, if anyone has questions or if anything new comes up I'll try to post here.
Sera says hi, and says "How are you? It's always nice to meet new people."