Humanity is an Onton; that is to say a reality meme which has influenced the development of intelligent species across billions of realities. This is why so many entities encountered across the realities develop a human shape. Even the humans of Earth, from their earliest evolution, were patterned as Humans due to the influence (via Darkness) of the Human Onton.
In some realities, Human shaped entities may be combined with Lizards (See Jiboor, Serpent People) or plants or minerals.
Changes to the Human physiognomy will be due to local effects or the Darkness from other exterior influences.