This is a drawing of 3 different characters from 3 different video game RPGs doing trick or treating and this are...

Ashley from Remebrence( the girl on the right she is a edgy girl that helps a women named Kim to turn on the lamps of the black towers and fight the monsters known as enemies of hope)

Alice from HorrorVale(the girl on the center she is a female wizard who lost her dog and went on searching for him)

Rotting Jack-o'-lantern from Jimmy and the Pulsating Mass(the boy on the right is one of the forms from a boy named Jimmy who after defeating him gained his form and powers)

if you are interested in the games this characters come from here is the links

https://rpgmaker.net/games/11183/

https://rpgmaker.net/games/7503/

https://rpgmaker.net/games/10853/

and the credits for the characters who belong to

Ashley to Kyou System

Alice to BatWorks Software 

and Rotting Jack-o'-lantern to Kasey Ozymy