Lightning
I didn't finish the series, so he might have changed or something, but I was not fond of Crowfeather. He treated his family terribly.
This does not really change at all, at least from what I got from the books. He seems to care a bit about Leafpool, Lionblaze, Jayfeather, and Hollyleaf, but still shows a lot of resentment towards Breezepelt and Nightcloud.