First of all, I think Etcetera and Tugger would be an adoreable couple, 
you're right samara! Etcetera is surely kind of silly and naive, but she 
has the power and energy to entertain Tugger. And that is surely very 
important if you want to keep him. 

She is one of the kitten, but I don't think it's her first jellicle ball. 
In my opinion she is the sister of Rumpleteazer and Electra, and the 
daughter of Jellylorum and Skimbleshanks. Don't you think Etcetera and 
Jelly look very similar?

Her very best friend seems to be Electra, they are like soulsisters to 
me. Actually their relationship reminds me of Bombalurina and Demeter. 
They are together the whole time, and if you look very closely Etcetera 
seems to look after her sister. There are some sequences when she puts 
her arm around Electra to protect her. Well, I think Etcetera needs to 
be protected much more than Electra, because Electra seems like a fighter 
to me. 

All together, I think Etcetera is a kind and loveable character, even if 
she's often not knowing what she is doing. I think she is my favorite of 
the female characters and really worth to watch, even if she is just in 
the background. 

- Catcastle