Taiki could open the door with his ticket it is true, but currently all of his focus is on staying upright and holding onto Tidus' hand. His vision is blurred with the effort, especially since Tidus' clothes are still stained with blood.

The ouki keeps him focused though and he lets out a faint sigh as Gyousou opens the door, seeing him with his own eyes eases the tension that had not gone away even once the ouki had returned.

He steps closer, seeing that fierceness, the fire that is always within his king but not often seen on the surface. A step and then...

He stumbles, perhaps sensing he is finally safe the will to keep going regardless leaves him and he crumbles where he stands.