Because of his lack of screen time, little is known about Rydinger's personality. However, it can be implied that he is a calm and friendly person, and is liked by most. He is also shown to be just as awkward as Violet once was.
Tony is a 14-year old popular student of Western View Junior High on whom Violet Parr has a crush. She tries to talk to him, but is too shy and disappears whenever he looks at her. This is seen in the beginning of the film when Rydinger is leaving with his posse and briefly catches a glimpse of her before she disappears.
At the end of the film, he finally notices Violet while attending Dash's track meet in the epilogue to the film, and invites her to go to the movies. He does so with a stutter, and Violet shows she has overcome her shyness by finishing his sentence. Rydinger and Violet then settle on going on a date that Friday.