It actually really cracks me up how unabashedly tsundere Perry the platypus is for Doofenshmirtz.
"God damn it, Heinz."
"God damn it, Heinz.”
"I fucking swear, Heinz."
"Doofenshmirtz has been incommunicado for far too long. Either’s he’s up to something big, or he’s met with some sort of foul play.”
“I’M COMING, HEINZ!!”