Omega

Omega (オメガ), also referred to as the Omega Excalibur (オメガエクスカリバー), is one of Alpha's primary allies Twilight Destiny. She appears prominently in Stardust Requiem.

Omega is introduced as a member of a clan in the North Side region in another alternate universe who initially did not realize reality had been changed. After experiencing strange visions of the past, Omega's memories of the original reality were restored and joined the amnesiac cyborg known as Alpha, using her knowledge of legends and myths to discover the existence of the Sword of Destiny and the Twilight Note.

The two were later joined by Russell Johnson and Karma in a quest to find the Twilight Note, however, this put them into direct conflict with Theodore Heimrich. It was eventually revealed that she was the key to finding the note, as she was, in fact, the reincarnation of Fate Acnologia, and also destined to meet and kill the reincarnation of Epsilon, who was revealed to be Dark Alpha (initially believed to be Alpha).

Following this adventure, Omega and Alpha participated in the new Grand Championship.