Talk:Ghost/@comment-26497229-20160513132227/@comment-27550231-20160602140812

Well it's more like the tree branch model. Same parent species but it just branches off, but if you really think about it the mamono were grafted on to the tree by the demon lord. All monsters were originally their own species but were then changed to be compatible with humanity. The succubus grafted the mamono branch onto our tree and it has been able to survive despite many attempts from the host to remove it.