Is it necessary to upgrade the diamond headdress of Kingdom Tears?

This is necessary. According to official website's query "the legend of zelda: Tears of the Kingdom", the diamond headdress is a kind of equipment that can be upgraded, and the attributes and special effects of the equipment can be improved through upgrading, so it is necessary to upgrade the diamond headdress of Tears of the Kingdom. Tears of the Kingdom of the legend of zelda is an action adventure game developed by Nintendo's planning and production headquarters. It is the 20th work in the main series of the legend of zelda, and it is also the orthodox sequel to the legend of zelda: The Breath of the Wilderness. It was released in the webcast "Nintendo Switch to Face: E 32019" on June 65438, 2009, and released in 2028.