Rosearik Rikki Allen Simons (born September 8, 1970) is an American voice actor, writer, cartoonist, and animator.

Simons was the color designer for the animated TV show Invader Zim, and also voiced the robot character GIR.

[1] Show creator Jhonen Vasquez wanted someone with no experience in voice acting to play GIR, to reflect how broken and messed up the character is.

That's partly true, but I'm not a voice actor... while I did the voice-actor thing of taking his direction on inflection and I read the lines provided, I was really having the best time ever just yelling and screaming and being stupid.

[citation needed] Simons has gone on to other voice acting roles, including on the cartoon Mighty Magiswords and the 2021 video game Psychonauts 2.