In addition to the aforementioned Master-Apprentice Chain between Seven, Leo, and Zero, with Z being the latest addition, the three components serve as a link between Showa and Reiwa.
Ultraman Z in general is the second entry of this current era, and the titular Ultra himself is the fourth Reiwa Ultra after the Tri-Squad, who are the first three Ultras to appear in the first series of that era. Again, regarding with the aforementioned forms of Z, director Kiyotaka Taguchi stated in interview that the three forms represent the three eras of Japan's monarchy:.Sigma Breastar (Zoffy, Tiga and Mebius): The three possesses thermal-based powers and have inspirations from the original Ultraman's design archetype.Geed likewise defeated his own father and saved his own universe and eventually honored as a hero. Being cloned from Belial, Geed was pressured by the public eye due to the uncanny resemblance of his father and would have joined his father had Laiha not interfered.One should note that Zero used to desire power like Belial, but his father prevented him from touching the Plasma Spark, and being trained by Leo during his exile tempered him into the mature heroic Ultraman we know that saved the Land of Light.To Geed, Belial is his father, a part of his life.
Again, Zero was bitter enemies with Belial, and guided Geed as an Ultra, becoming like a big brother to him. Belial was defeated by both his own son Geed, and Arch-Enemy Zero, making them both heroes. They also both share an intimate, complex relationship, direct beings on the path the others took. Not only Zero and Geed are in fact antitheses to Belial, but the latter serve as the Shadow Archetypes to the two had they fell into the same dark path as he was.
They are also often placed together during crossovers and popularize the idea of their human hosts being in control of their Ultra alter-egos. Tiga, along with Dyna and Gaia are the first three Heisei Ultras. Gamma Future ( Ultraman Tiga, Ultraman Dyna, and Ultraman Gaia): Tiga was the very series that revived the Ultra Series following a 15-year long hiatus since the finale of Ultraman 80.