What arc does Kizaru appear?

Because of his actions, Kizaru can be considered the secondary antagonist of the Sabaody Archipelago Arc and one of the major antagonists of the Marineford Arc.

Does Kizaru have Haki?

Haki. Like all of the Admirals, Kizaru is capable of using Haki in combat such as Busoshoku Haki to defend against Whitebeard’s powerful attack during the Marineford War.