Lisaroo

A Lisaroo (a portmanteau of a kangaroo and Lisa Loud) is a sapient mammal that resembles Lisa Loud in a kangaroo costume that she wears in a Loud House episode, Tricked!, to real life Earth.

They are all in the age of 4, like Lisa Loud in that show, where she is at the age of 4, and they don't age at all, so they keep themselves 100% 4-year olds, because they are generated by a team of Australian common human scientists.

Unlike in the music video sung by Luna Loud that promotes that epsiode, Tricked!, where Lisaroos looked scary and aggressive, Lisaroos are very peaceful to all sapient species and beings, except vampires, due to bloody conflicts with them, plus they are rather docile, calm, and peaceful, unless if there are predators and vampires that are bound to harm them.

Like that music video, and the picture, they can also have rabies, but only for self-defense purposes as well, because using rabies for no reason, like in the music video, is not very tolerated to humans as well. Plus, because Lisa is a very smart female toddler, Lisaroos are extremely smart as well.

They are omnivores that feed on the same food as any other sapient species and sapient beings, but like kangaroos, they are mainly herbivores, and they can eat grasses, flowers, leaves, ferns, mosses, and even insects.

They are mainly found in forests, and even in human settlements.

Unlike in movies, they were never humans, as humans are primates that are part of the ape family, while Lisaroos aren't primates at all.