so i accidently stumbled upon the perfect name for the mc's hero persona "rimuru" partly due to the shapeshifting powers of the character of the same name from "that time i got reincarnated as a slime" and partly cause the name is japanese wordplay with it reading as 666 which is appropriate given both the dark nature of the mc's powers (such as the black arms getting excited when the mc decides to kill) as well as being the the number of the beast and the mc gained much of their power from animals (animals r often reffered to as beasts)