You and Kaka have a nickname for each other?
I call him Boo
Because of the film, Monsters, Inc. The little girl said “Boo” and scares the little monster. I thought that was pretty cute, so I started to call him Boo. He calls me Boo too, but also calls me “Life,” “Love.” When he’s mad, call me Caroline. And, beyond him, is only my mother that calls me of Caroline.
~ Caroline Celico (in an interview for the magazine “Isto É Gente”)