Ultraman Tregear - an Ultra who is blessed with a kind superior and trustworthy friend. However, dispite his natural talent, Tregear is tormented by his own limitations.At that time, an incident occurs that will change Tregear’s fate.
- Adaptational Expansion: Hikari's transformation into Hunter Knight Tsurugi was revisited from a similar scene in Ultraman Mebius Gaiden Hikari Saga, but this time, Tregear was added to emphasize Hikari's descent into Revenge seeker.
- Broken Pedestal: Tregear becomes disillusioned with Hikari and Taro as the episode progresses:
- Hikari used to be Tregear's respected chief officer in the Technology and Science Bureau, but his Despair Event Horizon and assuming the mantle of Hunter Knight Tsurugi only adds fuel to Tregear's diluted morality over darkness and light.
- For Taro, his old friend, Tregear idolized him for his optimistic approach, but came to the conclusion that Taro is only being who he is due to being a Born Winner and that he can never understand someone with personal issues like Tregear.
- Call-Forward: Taro runs into a Night Fang summoned by Tartarus, which is one of the monsters that his son fought in the 7th episode of his series.
- The Corruptible: Hikari becomes Tsurugi after descending into Revenge for Bogar and Tregear was quick to fall into Tartarus' temptation to change his fate.
- Deal with the Devil: Tregear averted his fall into darkness when Tartarus show him his future, but instead, he made a deal with Tartarus, of all people, to change his fate.
- Downer Ending: The episode ends with Tregear joining with Absolute Tartarus. Taro is incapacitated and watch his once good friend turning to the side of evil.
- Fighting Your Friend: The first thing Hikari ever did once he become Tsurugi was to slash his way against his former co-worker, Tregear. It only turns him into a Broken Pedestal to the very person who admired him.
- Future Me Scares Me: Unlike Belial, who went ballistic from the revelation that his future achievements were All for Nothing, Tregear only shows genuine fear after seeing his future as an evil Ultraman.
- Good Cannot Comprehend Evil: Tregear accused Taro of this trope, as well as his Wide Eyed Idealism as his former friend's Fatal Flaw:Ultraman Tregear: That's how you only see things from one side. In this world, there is neither light nor darkness.
- Jade-Colored Glasses: Tregear was originally as idealistic as other Ultras over the light triumph against darkness, but seeing even his respected chief Hikari became Tsurugi and his future self becoming an evil Ultra reach Tregear to the conclusion that darkness and light are meaningless.
- Protectorate: Taro is willing to become Tregear's protector after his childhood friend loathes his own self-esteem for not being strong enough to join the Inter Galactic Defense Force, however, Tregear rejected the idea itself.
- Say My Name: Taro shouted Tregear's name after his former friend left him for Tartarus on Planet Deastar.
- Series Continuity Error: Hikari is supposedly a yet to be named Ultra in his early days on Earth after chasing Bogar and assumed the mantle of Hunter Knight Tsurugi, "Ultraman Hikari" being a registration code given by Ryu Aihara. Here, he already has the name from the get go.
- Shout-Out: The planet Taro and Tregear visited was named Planet Deastar. You don't say.
- That Man Is Dead: This gem from Hikari after assuming Hunter Knight Tsurugi.Hunter Knight Tsurugi: Ultraman Hikari is dead! Now I'm Hunter Knight Tsurugi, who lives for revenge!
- There Are No Therapists: Despite Land of Light's advancements, this is the very problem they actually faced, as if a therapists actually existed, then Hikari and Tregear's fall into darkness can be avoided.
- Took A Level In Cynicism: This entire episode as a whole revolves around Hikari and Tregear losing grip of what remains of their idealism, although the former was more responsible for the latter's downfall.
- Unwitting Instigator of Doom: If only Hikari still had a grip on his idealism and isn't a hellbent revenge seeker, then Tregear would not fell into darkness.
- Wide-Eyed Idealist: Deconstructed. Taro was too optimistic to help Tregear and has an unshakable faith in light, but he fails to actually understand Tregear's personal problems and self-esteem issues.
- Villain Protagonist: A pre-Face–Heel Turn Tregear is the main focus of this episode.
