Sorry for the wall of text, but Lash discussion got me thinking, and actually another reason to choose the Fivefold Courts specifically is that it is uniquely suited to help resolve Harry/Lash situation.
If the courts would win, I would like to raise the question with them as soon as possible, but it wouldn't matter if it's later.
What do you guys think? Due to Commited loyalty feature and the futuristic cyberpunk fluff of the Courts we can get any help we need, and everything we need, including a futuristic cybernetic body perfectly suitable for housing Lash, very quickly, in under several hours. And it's better and safer to do that in our Hell. And the beauty is that we can be perfectly honest and won't lose much, if anything at all, in any outcome.
Tentative plan of what to do:
1. Get tete-a-tete with Harry, charisma empathy excellency, raise the question, along the lines of:
"Lash, I can get you out of Harry into a body perfectly suitable for finally living your life as your own person. Harry, sorry for don't telling you earlier, it was untested, I judged it not safe enough, and there weren't any available means of embodiment.
Lash, after all these years it's self evident you are a person with your own free will. You may of course choose to follow your original purpose, but it is not necessary the only purpose you can have in life, you may choose otherwise. As much as Harry is your prisoner, you are his, and I present an opportunity for you to be free, though it naturally requires both of you to consent. And let's be candid with each other, I can't do anything disagreeable to you without risk to Harry's well-being, but I am capable of finding you wherever you may be and annihilating you utterly if you ever harm Harry.
I extend to you a standing proposal, ask me and I would transfer you from Harry to your own body. I would then ask you if you intend to directly or indirectly harm me and mine in any way, examine your answer, and either leave you a prisoner here, in my realm, or release you to live your own life however you see fit, extending an option of swearing fealty to me. I will reward loyalty with protection, and willing doing my bidding will ease any pains your darker nature may cause you."
Use BSM and CCC in a standard way for -4 difficulty to help get the point and that we are completely honest accross.
2. If Lash agrees, perform the excorcism and transfer into a suitable cybernetic body.
While waiting for everything to get ready, use CSR to top up essence if required.
Use BSM with a suitable liquid and CCC in a standard way for -4 difficulty, do everything in a cold room for +2 die from WHWH, with Harry protected by the best magitech equipment our explorers of the freezing wilds have, any applicable excellencies.
Before commencing excorcism and transfer, Crown question with Occult excellency for understanding and interpretation, using the current situation as the focus, "Disregarding anything that would break my self-imposed white heavens-related limit, what is the nature of the being I intend to excorsice from Harry and thransfer to this body?"
After we ask Lash if she intends directly or indirectly harm Molly and Molly's in any way, Crown question using the situation of the question and the answer as focus, "How and to what extent this answer corresponds to intentions of the answerer?" The question is viable because it's not about the future, it's about intentions as they are now. And while it's a small comfort, as intentions can change, we actually can't get anything better due to respect of the free will, and the form of the question, regarding intentions, would sidestep any bullshit of the 'I believe that I am, but I'm actually not' variety.
@DragonParadox, please tell if the Crown questions (and, if it's not too much trouble, anything else) are not viable.
And now rationale why it would work and why it's good for us to do.
Lash has following motivations:
a) The original one, from her originator, to seduce Harry to use her powers and the coin, slowly diminishing.
b) Self-preservation.
c) The new one, self-actualization, slowly growing, in DF canon finally leading her to sacrifice herself to protect Harry.
The proposal as outlined above works with all these motivations. It's obviously touches on self-actualization, offer of protection for loyalty touches on self-preservation, and even if the offer is rejected in favor of the original motivation, it would actually still work for us by eroding the original motivation faster, whether just being at the back of Lash's mind all the time or actually causing her to increase intensity of her futile seduction efforts, speeding her up on her DF canon trajectory to self-actualization. Eh, that's of course if Harry will hold, but I trust in him.
The only possible source of complication would be Lash now knowing any capabilities, but as far as I remember there is no way for her to spread this information without Harry's consent.
So, overall it's a good action, and if Fivefold Courts would win, I would propose and vote for that if you guys would consider it.