Hey Arnold! is a classic cartoon for a reason. The memorable characters and relatable storylines make it a timeless favorite. But beyond Arnold himself, and his best friend Gerald, the supporting cast really brings Hillwood to life.
One of the more unique residents of Hillwood is definitely Brainy. Always lurking in the shadows, always watching, alwayssweating? He’s a character that’s equal parts mysterious and hilarious, and he’s definitely left his mark on the show.