I have to say, it's somewhat odd to see all these demons from different allegiances together.
Although I understand that with Lorem around, it's useless to bear any hostility towards each other, the issue is that it seems like they have no hostility to start with.
Eliza's father in law is the chief of the harmony faction, but since his assistants abducted Eliza, and they expected humans might retaliate, so the hardliner faction were guarding them. To be fair, the hardliners are just hostile towards humans, but if you consider their reaction to a demon who defected to the human side, you really wouldn't expect them to want to provide any help to a faction with opposite goals.