> Consider.
So. Being a witch is... kind of bad, to put it lightly. These are the things that you first knew as horrorbeasts of pure despair, then as magical girls corrupted by despair or overuse of magic, and then what you accepted as your own inevitable eventual end state.
...and, well, here you are.
Thankfully, you aren't really feeling all that much despair at the moment. That recent breakdown you had, forcibly lanced to a wall at the time or not, was very emotionally cleansing, and in truth this transformation may actually have solved a problem or two more than it causes. Your life was already pretty much in shambles, so hey, at least now you don't have to go home and deal with that. The whole pointless magical girl play theater you've been stuck taking part in is also a thing of the past, since you're a senior member of that club now. Heck, if it weren't for the fact that its junior members are now probably going to hunt you down and attempt to kill you at some point, this might even be a flat improvement.
Not that you particularly like the idea of living out the rest of your life as a giant book monster, regardless of your former problems, but you might as well just accept it, at least for now. You're not feeling any particular need to inflict despair upon people, or eat people, or "kiss" people to drive them to suicide, so as long as your human mind and mentality stick around, you suppose you're relatively okay with this. You can be Ashtaroth, the GOOD witch... pfft, there's a title.
That settled, you should probably try to get better acquainted with... everything, now.
[-] Explore. This place looks like a blank, endless white void, but surely there must be something in here.
[-] Experiment. Every witch has some sort of powers, so presumably you do as well. May as well figure out how to use them.
[-] Introspect. Er, what was that stuff you were thinking a minute ago, again...?
[-] Write in.