So these are just some head cannons I have. There will be 5 head cannons I'll put for each head cannons chapter I write.
1. Moon has a fear of loud noises cause of past experiences as a kid and when it gets too loud he'll get upset but he doesn't show it cause he's so used to bottling up his emotions
2. Eclipse has a parasite/voice in his head named Homicide which is the reason he acts the way he does and Homicide often reminds him of his past mistakes which leads to him locking himself in his room sometimes
3. Moon and Sun both have a huge fear of being locked in rooms cause of their childhood
4. Sun is afraid of the dark
5. Moon often drinks (not alot) to escape from the voices in his head
Have an amazing day/night!