The fact Vincent & Gill are both seemingly connected to the tragedy, plus the fact that Elliot claims to have written "Lacie" (Or l guess produced the melody) makes me think Glen had close relations to the Nightfall family (is that the name of the family? I forgot), or atleast something like that.
What if Alice is the Abbyss' will? Or it could be connected to her memories.
Like Oz is the key to Abbyss but also seems to be related to Jack (who seems to have known Alice in the past) & is also playing the 'role' of Alice's Knight!
Perhaps Alice was one of children of the Baskerville family (can you call it a family?) or something but was somehow sacrificed towards their goal to get all the Abbyss gates?
Can we just talk about the fact that we are outright told that Raven is Gill in the maid AU after the actual chp. Or maybe I'm just slow & we were supposed to get that Raven is Gill when Raven gave Oz that nervous look👀
I realised it was hanako's old home when they went in! Like think about, a family committing suicide 50 years ago? (Around the same the hanako and tsukasa passed away). The dolls (hanako talked about dolls, l mean it was a kokeshi and he thought it was sexy but still.
It sealed the deal for me...