A: Hello! Yes Devil's Food is related.. I imagine Devil's Food is just Charlotte and Angel goofing off in some random location. They're probably not thinking entirely straight and just want to feel autonomous. They can kind of do whatever they want due to ~divine power~.

Regarding Angel's maliciousness, Angel doesn't view any form of life as very valuable outside of if a person entertains her or if she cares about them. as in, she doesn't think most people have value in the universe, but they can be special to her emotionally even if she thinks their death would not change anything overall. she kind of just enjoys being mean/exercising power over others when she views it as a consequence free activity as it's something she's usually actively rewarded for doing throughout her life, especially post Ommatophilia.

For more context, Devil's Food takes place in a location Charlotte and Angel will never return too again, so they're basically treating their surroundings as a giant dollhouse until they leave haha (as I said earlier, primarily to exercise autonomy but also just to blow off some stress)... But um, although they view their random outings as consequences free, they aren't actually haha! I hope to explore this in future works someday.

There are some other reasons Angel behaves this way in Devil's Food that have to do with Angel culture haha ^w^ But Angel is a bit of an extreme example compared to other angels due to all she went through and continues to experience haha.