Likely demonic possession since that's what demons are after 😈
Probably but are they not like friends now
With Yu speaking and mainly Asuramaru getting memories back, that is a way to temper the demon urges for possession, yes.
In addition @Triores replies are able to be edited if you meant to add something for your first message 👍
The fandom will be oop-
Interestingly they have known each other the longest in terms of how far back they go.
What do you think?