Sylvester Kobayashi is a character from the Penn Zero: Part-Time Hero Series. He was voiced by George Takei. He is the father of George and Sashi. Although they learned about Sashi's job at Peces Pescados in "The Kobayashis," Sylvester and Tia, Sylvester's wife, were unaware of her role as a quasi-helper because Sashi claimed to have forgotten her uniform. However, when they learned of her employment, they deemed it dangerous and demanded that she retire. However, after completing a mission in Space World, in which they win and award Sashi a trophy for "Helper of the Month," they conclude it is best to accept her as she is. Since Sashi is done with missions in "At the End of the Worlds," her family gives her a prize for being an almost helper.