I'll admit to cheating a bit here with my definitions and playing a bit hard on the tension between the actually idea and the motivation/actions of the character.
Disclaimer: See ch. 1
Parallel: Having the same direction, course, nature, or tendency; corresponding; similar; analogous.
Slick loved Rex, wanted to be just like him. One day Rex notices his efforts; he smiles at Slick, tells him he's glad to serve alongside him. Slick feels ten meters tall.
A week later they land on Geonosis. Chopper gets half his head shot away before he's fully off the transport; covering Slick in his blood. By the time Rex comes to tell him he's been promoted he only has three of his boys left. Rex stands next to a stone-faced Jedi and tells him he understands how much this hurts. Slick realizes he will never be like Rex.