The Stillness Star is a disc set that increases the damage dealt by characters who appear with Quick Support.
However, the set effect activates even if the character equipped with the disc does not activate Quick Support.
By using this, in special parties that organize two supporters such as Kaiser + Lina, Seth + Lucy, etc.
You can simultaneously activate the Swing Jazz 4-set and Stillness Star 4-set options to greatly increase the firepower of the main dealer.
However, due to the nature of the Stillness Star set, you need to activate Quick Support often, so energy management of the main supporter is important.
And Swing Jazz allows for efficient party management when equipped by characters with short combo skills and ultimate skill motions!