Jey

Jey (ジェイ), who transforms into the evil Kamen Rider Dark Necrom Y(ellow) (仮面ライダーダークネクロムＹ [イエロー]) is one of a trio of Kamen Rider Necroms who serve as Kamen Rider Dark Ghost's guard.

Damashii
Dark Necrom Y's forms are called Damashii (魂), accessed using the Ghost Eyecons. She also bears a headpiece called the Persona (ペルソナ), which gives off a glow effect with the rest of her body. The Persona changes with Dark Necrom Y's numerous Damashii forms, as well as serving as a prefix title for all of the Damashii forms' helms.

Devices

 * Proto Mega Ulorder - Transformation device
 * Ghost Eyecons - Transformation trinkets.

Portrayal
Jey is portrayed by Yuko Takayama (高山侑子), who previously portrayed Rinko Daimon in Kamen Rider Wizard. As Kamen Rider Dark Necrom Y, her suit actor is unknown.