Dark Zagi (Ultraman F)

The alternate version of Dark Zagi (ダークザギ) is a dark giant called to the Earth by child scientists of a foreign country, Soso and Utsutsu. He is one of the few antagonist of Ultraman F and was the one who (accidentally) triggered the alternate reality Akiko Fuji's transformation into an Ultraman called Ultraman F.

Ultraman F Chapter 3: Dark God of Destruction
Dark Zagi was summoned by the child scientist Soso and Utsutsu from a dimensional tear made by their clone Bullton. Their main wish is to become beings whose existence transcends even the humanity, Zagi instead ignored it, knowing much that they only wanted to survive and instead transformed them into his dark giants, Dark Mephisto and Dark Faust respectively. He has no interest on their wish to create a new world but choose to watch their progress from afar.

When Dark Mepisto and Faust on their killing spree, Akiko Fuji appeared and utilized the giant armor to become Giant Soldier F, facing against the dark giants. Fuji as well called Zagi as a fake Ultraman, provoking the destroyer to join the battle as well. Ultimately, when Zagi fired his attack on the giant armored warrior, this caused Fuji to be mutated into Ultraman F. The Ultrawoman soon killed Faust with Specium Ray and defeated Zagi and Mephisto with M87 Ray.

Zagi watched in astonishment that not only he created a powerful opponent in Fuji but she as well revoke his title as a genuine Ultraman. Angered, Zagi is about to attack the city but was teleported by Fuji to another place. Soon, both engaged in a fight by teleporting to various cities in different countries and finally landed on the moon where both clashed against their finishers. Zagi was defeated after F's finisher penetrated his Energy Core, followed by a huge explosion.

Techniques

 * Original Powers of Dark Zagi: It is safe to say that this alternate version of Zagi retained the same power as the original.
 * Lightning Zagi (ライトニング・ザギ): Zagi's main finisher.
 * Teleportation: Zagi is capable of instant teleportation to any places he desired.
 * Dark Giant Creation: He was shown capable of turning humans into Dark Giants, transforming the scientist pair Soso and Utsutsu into Mephisto and Faust.

Trivia

 * This Dark Zagi is mentioned to have a similar past to the original one, as shown being provoked when Akiko Fuji called him a fake Ultraman and refused to acknowledge him as a genuine one. The original Dark Zagi turned against his creators, the Visitors after realising his true status as a rip-off of Ultraman Noa.
 * His battle against Ultraman F is a reference to the original incarnation's battle with Ultraman Ginga.