Perry and Elise

Much of the world sees Elise as impossible to separate from her disabilities.  Sweet but not able to do much.  Like Perry,

"Well, he is a platypus. They don't do much."

―Phineas Flynn^[src]

I see Elise's brain-numbing speed at getting exactly what she wants with almost nothing able to stop her.  Dynamic in the fullest sense.

"In your letters, you described your nemesis as a 'suave, semi-aquatic personification of unstoppable dynamic fury'."

―Dr. Gevaarlijk to Heinz Doofenshmirtz, referring to Perry.^[src]

"[He is] fierce, cunning, and good with a grappling hook..."

―Heinz Doofenshmirtz, referring to Perry.^[src]