Tregear Eye (トレギアアイ Toregia Ai) is a transformation device used by Ultraman Tregear’s human form, Kirisaki. Its design when opened is based on the mask he wears, while its closed form resembles Tregear's chest plate.
Kirisaki presses the button at the top of the device to open it up, changing its design from Tregear's chest to his mask. He then places the device adjacent to his face and transforms into Tregear.
|Showa Items||Beta Capsule | Ultra Eye | Willpower | Ultra Rings | Ultra Badge | Leo Ring | Beam Flasher | Bright Stick | Bright Bracelet|
|Heisei Items||Delta-Plasma | Willpower | Beta Capsule/Flash Prism | Estraller | Pikari Brusher | Spark Lens | Nice Dreamer | Reflasher | Esplender | Agulater | Cosmo Pluck | Just Lancer | Evoltruster | Darkevolver | Max Spark | Mebius Brace | Knight Brace | Ultra Zero Eye | Saga Brace | Ginga Spark | Dark Spark | Dark Dummy Spark | Gunpad | Ginga Light Spark | Livepad | Victory Lancer | Chibu Spark | X Devizer | Orb Ring | Orbcalibur | Orb Slasher | Riser | Ultra Zero Eye NEO | King Sword | Giga Finalizer | Gyro | Orb Ring NEO|
|Reiwa Items||Taiga Spark | Tregear Eye|
|Manga Only Items||Zoffy Bracelet | Jack Bracelet | Gorian Belt | Zaji Sword | Drew Bracelet | Flare Coin | Alphonne Pendant | Ars Ring | Mimicry System|