Smallville is a TV show about Superman's years growing up in Smallville. Chloe is one of his classmates, a character invented for the show.

In the comics I'd say Superman is EII and Lois is LSE. It's been so long since I've seen the show, though, that I couldn't say what their types are there.

From what I remember, Chloe seems like an ESE with "super computer hacking skills" grafted on. Certainly the actress is ESE; she is eerily similar to an ESE I know in RL, both in behaviour and physical appearance, to the point that the ESE I know once saw a photo of Chloe and was momentarily confused because she didn't remember ever wearing clothes like the ones in the photo.