Unintentionally Unsympathetic: Alfredo the Ghost Chicken. While what Sergio did to him when they were in flight school was certainly not cool (along with Sergio trying weasel out of righting the wrongs he did to his old roommate), it becomes harder and harder to feel sorry for Alfredo when he haunts the Casagrandes as a whole instead of focusing on just Sergio. There's also how the main thing Alfredo wants back is the sunglasses that Sergio had stolen from him, especially since it turns out that Alfredo can communicate (via possessing someone, which Alfredo ultimately does to Carlos).
