Aestrix doesn't remember the specifics of how exactly she became this... whatever thing... she decided to become, but she definitely remembers making a conscious choice and being kind of excited about the results of it. She wanted to do this, and while she's a little nervous, she thinks it will go well, and regardless, she will have fun.
She goes to sleep, and then when she starts to reawaken, it's done. Whatever 'it' is.