Fun fact, in some of the games where Zangya appears, if she fights Android 18, it turns into a catfight over Krillin. No Exceptions.

Zangya: "Your man's pretty cute"
Android 18: "Skank"

I'm reminded of that scene in Bio-Broly when Krillin gets embarrassed by the one female scientist latching onto him and 18 was clearly not having any of that.

I suppose, between the two, you've got the tough, cool-beauty 18 and the (as of now) intelligent and gentle 21.