Twinkle Aegis is an Artificial Sacred Gear that was created by Azazel and specially given to Tsubasa Yura.
Summary
In Volume 14, Twinkle Aegis was one of the 5 artificial Sacred Gears given to members of the Sitri group that was personally given to Tsubasa, which she later used on a mission to save the first-year members of the Occult Research Club, that were kidnapped by the Magician Faction of the Khaos Brigade.
According to Sona, the Twinkle Aegis has a fairy residing in it through a pact.
Appearance
Twinkle Aegis takes the form of a shield of light
Abilities
Twinkle Aegis can create a giant shield made of light for defensive purposes, it can also be released towards the enemy while spinning in a yo-yo-like fashion and can have fire and lightning surrounding it. The Fairy within the Sacred Gear is also capable of changing its abilities. It can also create a large barrier of light while having flames surrounding it.