Played (in the video) by Rosemarie Ford
Bombalurina (also known as Bomby) is one of the older cats. She's definitely not a kitten anymore but isn't considered "old" she'd probably be in her late 20's in human years (I'm guessing). Bomby has been referred to as "The sex cat" because she's always flirting with the Rum Tum Tugger. (This term kind of amuses me since it's a bit funny to imagine cats flirting but, hey that's how it is.
She sings the "Macavity" number with Demeter. She mostly participates in every song except for "Gus: The Theatre Cat" which sung only by Jellylorum and Gus.
She, like most of the older cats, isn't too fond of Grizabella. I don't think anyone knows exactly why, but I think it's supposed to be left up to your imagination. (I go with the popular opinion of Grizabella had the left the tribe/junkyard and wanted to come back. But since she'd gone in the first place, no one wanted her around.)
"...You may meet him in a by-street you may see him in the square...but when you reach the scene of crime, Macavity's not there..."