headpiece
A decorative type of headwear that is fitted around one's head (usually being fitted near/on the forehead) and doesn't fit the traditional definition of a crown, tiara, hairband, et cetera. A headpiece can be worn with a hat though is usually shown being worn on its own. Headpieces are usually depicted as jewelry, though it can be made out of nearly anything such as cloth, machinery, and so forth.
Jeanne d'Arc from Fate and Yomi from Puzzle & Dragons are good examples of characters that wear a headpiece.
See Also
一种戴在头上的装饰性头饰（通常安装在前额附近/上），不符合皇冠、头饰、发带等的传统定义。头饰可以与帽子一起佩戴，但通常显示为单独佩戴。头饰通常被描述为珠宝，尽管它几乎可以由布料、机械等任何东西制成。
《Fate》中的 Jeanne d'Arc 和《智龙迷城》中的 Yomi 就是佩戴头饰的角色的典型例子。
《Fate》中的 Jeanne d'Arc 和《智龙迷城》中的 Yomi 就是佩戴头饰的角色的典型例子。