So, lore for the Shadow System AU. Which would start at the beginning. In the shadows between the realms, whispers of knowledge gathered. The power collecting until it formed into a young mystic monkey. Child Mihou was deposited in the mortal realm.
Mihou began to explore, finally finding a village. A human village. However, since it was the first village he happened upon he stayed near it anyways. Despite the unfortunate side effects of that decision.
Why was staying near the village bad for Mihou? Well, because it was a human village they viewed all demons as threats. Including him. And he unintentionally made things worse for himself by essentially Bruno-ing himself by telling people about futures he heard. And the Shadow System began to form to cope.
Macaque was more of a father figure to Mihou when he was younger, but as he got older it shifted more to being an older brother figure. And for anyone wondering why Plum showed up when Mihou didn’t even have friends…. He could still see couples being coupley. And relationships within systems are very common (who wants to guess who Moonbeam’s parents are?).
For most of his childhood until older teenager verging on young adult, Mihou lived near that village, being joined by Macaque, Yue, Rumble and Savage, Plum, and Moonbeam. Until Blaze joined.