Lord of Nightmares

"A being bound to no laws..." -

Lord of Nightmares ( 金色の魔王ロード・オブ・ナイトメア, Golden Demon Lord) is the essence described and chronicled in Bleach: Unknown Entity arc. When he takes human form, it is usually in the body of a young,silver-haired man, although he truly has no defined gender. He is neither a Shinigami, Arrancar, Hollow, or DNA Eater, and cannot be classified into such narrow terms.

Appearence
Normally, he takes the form