Tomoe

A is a Japanese abstract shape (i.e. a swirl) that resembles a comma or the usual form of magatama. Tomoe are usually seen in a design of three known as.

They form the pattern of the Sharingan and the Cursed Seal of Heaven which Orochimaru placed on Sasuke Uchiha and Anko Mitarashi. It has also appeared in the Ten-Tails going in three separate orbits around the pupil, and on Madara Uchiha's Gunbai. Orochimaru also summons a three-headed snake who has tomoes on its head. Orochimaru himself wore blue tomoe-shaped earrings. The Shirogane Clan's insignia is a golden mitsudomoe.