Hades Helmet

Description
Hades Helmet refers to the Gift that grants the wearer Invisibility, presumbably taken from the Greek myth of the Greek god Hade's Helm of Darkness. It is one of the two mass copied Gifts that Perseus made for its members. With the original loaned to the right hand man of Laius to take down the No Names in the Gift Game 3for Leticia Draculair.

Debut in:
Anime Episode 4

Volume 1 of Light Novel

Abilities
Copies do not have the crest seen in the picture and can only turn the person invisible. They are still able to be heard and smelled.

The original is able to hide scent, sound and turn the person invisible. However, as mentioned in the light novel, it's flaw is that it only makes the wearer transparent, meaning that the person is still there as a solid object. Because of this, Yō was able to emit ultrasonic waves using her Gift that allowed her to locate the wearer's whereabouts and tell Izayoi where he was, resulting in their defeat.