By Rachelkat:

Etcetera is one of the more energetic kittens. She hangs out with 
Victoria, Jemima, Electra, and those folks. She is positively in love 
with the Rum Tum Tugger. They might make a cute couple if Tugger 
isn't with Bomby. But for the time being, she's content to flirt with 
and faint over him.

Her past is probably muddled, she could be the daughter of Plato or 
someone, but that would be sort of nasty, considering how Plato seems 
to be checking Tugger out sometimes. I think that she is Asparagus 
and possible Jellylorum's daughter.

She's probably been raised a Jellicle, since she seems to know all of 
them very well. She's one of the more childish kittens, but that just 
adds to her character. She's always smiling and happy, pretty much 
opposite of Victoria and Jemima, who don't smile a great deal. Her 
best friend out of them all is probably Electra, because they're 
always hanging out together.