For those of us who believe that Rosie is Roo (or at least associated in some way) and Roo and Eve are one in the same...
Then what do we think about Alastor killing all the older Overlord but NOT Zestial, who a lot of people believe is Cain?
Just a coincidence, orrrrr...
We know Zestial is the oldest Overlord. From a writing standpoint, it's interesting that Alastor spoke to Zestial about his absence and not, say, this dapper fellow.
Look at this guy. I love this guy. ANYWAY!
The vibrant greens of Alastor’s magic matches Zestial, and they both have similar stitching.
Also, to me, it makes more sense as to why Alastor was nervous in this scene, if he knows who Zestial is but not what Zestial knows about him.
I'm not even fully convinced that Zestial is Cain, but this is a good argument for that being the case. Also, it'd be funny if Adam and Abel went to heaven, meanwhile Eve and Cain are chilling in hell, all moisturized and unbothered. Rosie and Zestial also have lil matching skulls on their big ol’ hats.
(Also someone in Twitter mentioned Rosie's line about eating her first husband is extra funny if you think she's Eve, so I figured I'd share that)