POCO
Poco is from a free game called POCO, a cute puzzle game with only a few darker scenes. Also if you couldn't tell theres clowns in this game.
POCO also has a beautiful and silly soundtrack that I am totally not addicted to whatsoever, don't look at my spotify top songs. The menu theme is totally not there. At all.
Poco's backstory is that you were a clown from The Circus in the Sky, but got kicked out because you didn't appease the Clowncil. Literally. That is the beginning of the game.
The dialog sounds for Poco are just silly horn noises pretty much. Also it's canon that the characters from POCO are created in a lab.