Chill the Hedgehog

Chill the Hedgehog was the star of one of the earliest Sonic fangames 'Sonic & Chill'. In-game she's Sonic twin sister who's trying to save her girlfriend and Sonic from Robotnik. 

The developer of the game demo would later delete it due to harassment and hate from others due to the bit frustrating game mechanics, homophobia, and erasing Sonics other siblings.

To the surprise of the developer, she would later find a full version of her game on the internet. She goes to download it and finds a sad and lonely Chill and a more sinister version of her girlfriend and Robotnik convincing her to trap people in their world.