Hot take.
Reimu is probably THE most "deserving" of a character as the indie rep and by far the most definitive example of an indie success story.
Touhou's been going strong since before the term "indie" even ever even became relevant and beginning till now has been developed alone. Tell me how often do you find a convention made entirely for just ONE game series endorsed, organized, and funded entirely by the fans? Not often, I'd bet. And that's just one example of the huge amount of fan creations which covers orchestrations, merchandise, animation, and games.
All that and it's made by one dude who loves his beer.