While I was lying in bed, I suddenly came up with a headcannon, (the night is bad for my sleep again heh). \(ОᗨО\ )
Ahem, in General, headkanon on Rem, perhaps somewhere similar was mentioned, or it looked so obvious that I did not notice it (ashamed), but I got such a head that Rem somehow tries to help Ccino cope with nightmares with his magic.
I will explain one thing, I do not know for sure if he can feel that someone is having bad dreams, but he checks his father's dream every time, and if everything is normal there, he either remains to watch and guard so that the dream does not turn into a nightmare, or leaves and returns after a while. Often, he can sneak into Ccino's room to be unnoticed by him to guard his sleep. He can sometimes lie down next to him, give him a light hug so as not to wake him up, or hold his hand, anything that could act as an external moral support. Sometimes he sneaks into his father's sleep while in this position, and when he's done checking on him, he stays with him a little longer and goes to his room in the so that Ccino doesn't catch him. (However, I think Ccino knows about his son's nocturnal adventures in his dreams.)
Yes, he can't always help his father with nightmares, given that he can't change dreams, but he can try to drive away the nightmare.(But this is not accurate)
[Rem by @thebluescreen]
[Delta99 by @thebluescreen & @help-im-a-gay-fish]
[Headcannon by me]