Nightmare/Geiz Myokoin

Nightmare (ナイトメア) is a character from the Soul series fighting games, originating from the rebooted timeline of Soulcalibur VI, and a character also appearing in Taki Gaiden: The Kunoichi Who Leapt Through Time.

The Identity of the third Nightmare is Myōkōin Geitsu (明光院 ゲイツ), also known as Kamen Rider Geiz (仮面ライダーゲイツ). By obtaining the Soul Edge Ultimate Ridewatch (ソウルエッジアルティメットライドウォッチ), he transforms into GeizNightmare.