This character wears a arm cuffs.

An arm cuffs is an article of jewelry that is worn around the upper arm between the shoulder and the elbow. Usually arm cuffs are manufactured from metal, leather, plastic or other materials and sometimes contain jewels, rocks, wood, and/or shells.

Arm cuffs can have various style too. Gold spiral arm cuffs are in Egyptian style while gold band with decorative golden swirls are in Spartan style.