idea behind wolf and lamb teaser

iv been looking but havent been able to find the lore of a lonly person splitting into two people or a wolf and a lamb to be more specific. this is the second time iv ever seen something use this type of history making me think that this is some form of fable/legend/fairy tale. if any one watches bleach then they had a character just like this trailer. he was so strong that those around him died becuase they could not handle being near him. so out of lonlyness he split himself in two so he had a companion that could always be near him and at the same time weaken him so that he didnt hurt all those around him. im speaking of coyote stark from bleach. when he split and created lilinette she has a pair of horns like that of a goat or lamb. and when stark uses his power he was able to split his soul into a pack of wolfs. so as i said since this new champion teaser is the second time iv seen this aspect of death loneliness and splitting of a being into two a wolf and lamb. there has to be some lore out there they are baseing this off of but i just cant find it. can any one else search and see if they can find it and figure out where this idea comes from?