Charlie Brown was originally a character in the comic Li’l Folks, a comic strip that predates the original Peanuts comic strip. Charlie Brown is a friendly kid who tries to have fun in his neighborhood. He often has a dog named Rover with him, who is a proto-Snoopy of sorts.
Ouiselle or “The Bird” is a woman named Véga de Ortega who fights crimes thanks to her artificial wings. She was raised by an anarchist group to be immune to fear.
She also has potions she gets from a scientist that give her additional powers like telepathy or heightened senses.
She first appeared in Véga la magicienne by french author Renée Gouraud d’Ablancourt in 1909.
Interesting character and kind of ahead of its time as far as a flying crimefighter is concerned.
Aino Erufu, an elf girl from Finland. She’s the mascot of an UTAU voicebank. According to the profile on UTAforum commercial use and use of most kinds are fine without permission
Matilda is an elephant who has motherly instinct to sit on an egg until it hatches. This is an early Dr Seuss story for Judge Magazine published in 1938 called Matilda, the Elephant with a Mother Complex.
The story was never renewed therefore it’s another Dr Seuss story that’s in the public domain.
The story itself would be reworked into the Horton book “Horton in Horton Hatches the Egg”, making Matilda like a proto-Horton.
Horton won’t be public domain until 2036 but Matilda already is.
Captain Z-Ro was a space opera serial from the 50s playing off popular serial characters like Buck Rogers and Flash Gordon.
He had a device called the ZX-99 which was a time machine used to view the past but also send people back in time, usually in order to alter it in some way. While it was always used to go back in time, mainly as a way to teach kids history it stands to reason the ZX-99 could also travel into the future.
The serial was not renewed and subsequent renewal efforts in the 80s were rejected by the copyright office.
The Backrooms is a creepypasta concept of glitching into some sort of liminal space outside of space and time. The inspiration was most likely the liminal space aesthetic that had been gaining popularity around that time. The original post came from 4chan’s /x/ post by an anonymous user who posted this image along with a small creepypasta. Due to the anonymous nature of it, there is really no person who can be credited with creating the Backrooms so the concept is public domain.
As for this picture, last year the owner of Hobbtown USA in Oshkosh, Wisconsin, Bob Mazza held a fundraiser for repairs of the location and one of the promises was releasing some old photos he had, including the iconic one which was found on archives of his website from 2003 when they were doing renovations.
He released them into the public domain and posted all his pictures of the location from back then onto the Internet Archive, you can find all the images here
So you can use the images and concept however you like.
