Arawaka is a butler in The Melancholy of Haruhi Suzumiya. Not much is known about him, but it is revealed that he is a member of the Agency and one of Koizumi's contacts. He is usually seen with Mori, another Agency member who takes on the appearance of a maid.

Arawaka is introduced as the butler of a mansion during the Lone Island Syndrome arc, but appears later on during the Lone Mountain Syndrome arc. He also helps in retrieving Mikuru from the other Agency.