Bertha is Fred's neighbor and she is the only person alive on this Earth who is actually nice to our friend FRED!! Kevin, why can't you be more like Bertha?! Bertha has crazy, colorful hair and dresses like she is part of a magical, evil circus! And she could give two hoots about what anyone else thinks. She's one trusty sidekick, even if that means following Fred into a bit of a pickle.
Bertha is played by Daniella Monet, who you may know as Trina from Victorious. She has also guest starred in numerous Nickelodeon shows like iCarly, Supah Ninjas, Zoey 101 and she played the very fun Tootie in Fairly Odd Movie: Grow Up Timmy Turner!