Charecter I really dislike

if I had to choose a character I really dislike I would have to choose Luke the son of Hermes cause he had been at camp half-blood for about 6 years the he betrays the camp to join kronos the dad of the big 3 (Zeus, Poseidon, Hades) but they betrayed him cause all he did was kill and eat people so when Luke joined his side everybody was disgusted and made then he poisons thaliana's tree and weakens the camps borders