Kif Kroker is Zapp's personal assistant and Amy's husband as of the last season of Futurama. Kif is an alient from the planet Amphibious 9.
Kif is voiced by Maurice LeMarche.
Zapp Brannigan: Kif, you're my best and most loyal friend but you've earned my contempt once again. As my protg you should know that the only way to deal with a female adversary is to seduce her. This time we are sure she's a woman, right?
Zapp Brannigan: Good! Invite her to my quarters. Oh, and have the boy lay out my formal shorts.
Kif: "The boy", sir?
Zapp Brannigan: You. You lay out my formal shorts.
Zapp Brannigan: Captain's journal; Star date... uh...
Kif: April 13th.
Zapp Brannigan: April 13th... point two. We have failed to uphold Brannigan's Law. However, I did make it with a hot alien babe. And in the end, is that not what man has dreamt of since first he looked up at the stars?... Kif, I'm asking you a question!