The only filler/noncanon that became canon character I can think of is Broly from Dragonball.
This happens often with comics, though. Like Harley Quinn coming from the BTAS and becoming just as famous and loved as other comic villains, but I don't think I've ever heard of that happening with a manga. Is there a filler character that the mangaka loved so much that they were added to the story and given some development?
This happens often with comics, though. Like Harley Quinn coming from the BTAS and becoming just as famous and loved as other comic villains, but I don't think I've ever heard of that happening with a manga. Is there a filler character that the mangaka loved so much that they were added to the story and given some development?