>>539193885
(samefag)
After giving this some more thought at work, Lunasia would be the Lusica, offering a Faustian bargain to M4A1 in the form of a bet with SKK's survival on the line which she ultimately won.
Although Lunasia seems a bit more unhinged and manelovent compared to Lusica. As the former ultimately wants to destroy the whole world and is amicable towards William before she got mindbroken by the emotions of M4A1.

Ultimately I can see a GF remake in the RC engine told from M4A1 perspective as a fairly decent adaption as it would give opportunities to showcase the various "failed" timelines and a lot of offscreen stuff cut from various major events.