Envy? Well, Shift is envious of the One that has the true power. Hence he uses Puzzle as a puppet in order to get the Narnia inhabitants to obey him.

Avarice and greed? Caspian wants the gold from Deathwater Island badly! And this is greed loosely- but Lucy does want to possess physical beauty very very much.

I admit that my cardinal sin IS pride. Maybe that is one of the reasons why I identify with Aravis so much.

Well, in some of his other books, Lewis talked about pride as though it was the worst of all sins, because it is essentially a spiritual sin, the first sin of any created being before there were people.

Yes, many people do refer to pride as the worst one of the list.

Some characters in other books do show pride. I wonder if Susan's pride was what led her to stray away from Narnia. Or a combination- such as sloth, greed, and lust. Pretty much everything except for wrath- although who knows if she was angry at The One In Charge for something not stated in the books.