Names：

Ultraman Taiga

（Tri-Strium）（Hero of Bonds）
Status： Form of Taiga, Titas, Fuma and Hiroyuki are One Heart
Tags： Ultra-beingAlien CivilizationMale
Form： (Hero of Light)
Appendage： Ultraman TitasUltraman Fuma
World： the World of Ultramen
LeveL： SS

Tri-Strium is Taiga's fusion power-up form, accessed through the use of the Taiga Tri Blade, in which he becomes the Hero of Bonds. Taiga, Titas, Fuma and Hiroyuki become one to grant Taiga a boost in all his stats. This form debuts in episode 16.

The Tri-Squad can also fuse into Tri-Strium without Hiroyuki by remembering the bond that they had with their friends on Earth.

Having been freed from the dark influence by his friends, the power of bonds between them culminated in a new form for Taiga: Tri-Strium. Using this new power, Taiga easily defeated the two Kaiju Kirisaki summoned; Hellberus and Night Fang. Enraged at the fact that Taiga had overcome the darkness and ruined his plans, Kirisaki transformed into Tregear to fight him. However, Taiga was even stronger now and could fight evenly against Tregear. Taiga drives him away using the Tri-Strium Burst.

Tri-Strium is Taiga's fusion power-up form, accessed through the use of the Taiga Tri Blade, in which he becomes the Hero of Bonds. Taiga, Titas, Fuma and Hiroyuki become one to grant Taiga a boost in all his stats. This form debuts in episode 16.

The Tri-Squad can also fuse into Tri-Strium without Hiroyuki by remembering the bond that they had with their friends on Earth.

Having been freed from the dark influence by his friends, the power of bonds between them culminated in a new form for Taiga: Tri-Strium. Using this new power, Taiga easily defeated the two Kaiju Kirisaki summoned; Hellberus and Night Fang. Enraged at the fact that Taiga had overcome the darkness and ruined his plans, Kirisaki transformed into Tregear to fight him. However, Taiga was even stronger now and could fight evenly against Tregear. Taiga drives him away using the Tri-Strium Burst.