Ideas for pet-names?

I want some more pet-names for Ellie & Rachel. For example, Ellie is Fluffy & my Wolf. Rachel is Fathead & my Kitten. I also call Rachel Psychokit, & Ellie Pumpkinhead.

I know this is a personal choice, but I just want to see what others think. Just any random cute, funny, or weird nickname. It doesn’t have to make sense.