WARNING: The following contains spoilers for To Your Eternity Episode 6, “Our Goals,” now streaming on Crunchyroll.
At the beginning of each episode in To Your Eternity, viewers get a quick recap of what previously transpired from the omniscient narrator that created Fushi. So far, it seemed this narrator would act more or less like a passive god, observing what's happening in the mortal world.
Instead of remaining a faceless character, however, the Maker decides to show himself to Fushi, and during one of the most dangerous times of his relatively short life. The Maker doesn't stay for very long in Episode 6, but his appearance is both highly memorable and revelatory.
Fushi's shape-shifting seems to rely on stimulation and taking on the forms of those who have already died. He regularly switches between the wolf and the Nameless Boy but since acquiring Oniguma and March's forms, he's used the latter primarily to feed himself. Each of these vessels has some kind of personal connection for Fushi -- most notably the Nameless Boy and March, whose deaths struck a particularly painful note for him. These two vessels are currently his only way of feeling human and remaining connected to them. When Fushi is in wolf form and drinking from the lake in Episode 4, he thinks back to the Nameless Boy and his last words, "remember me," transforming into the boy's form.
While sleeping in a forest one night, Fushi gets stabbed through his chest by a sinister-looking branch. It twists around his body, pierces the side of his neck and then erupts through his mouth like there's a tree growing out of his body. He tries to transform back into the Nameless Boy but something's wrong: the vessel's essence is getting sucked out of his body and into the branch, which materializes into a gruesome look-alike of the boy.
Not only did this monster steal the boy's form, but it also stole Fushi's memories of him, along with his awareness that anything was taken from him in the first place. The last memory Fushi has of him -- when the Nameless Boy is seated on his armchair and smiling at him despite feeling incredibly ill -- is now an empty space in his mind. Fushi can't put himself back together as the boy and is forced to take on the wolf form.
Time freezes as another new being, a hooded pale figure, materializes out of the ground and tells Fushi that if the Nameless Boy is important to him, then he needs to rip out the core from the monster's middle. Fushi tries but is no match for the creature, who steals his wolf form as well. Poor Fushi has no choice but to transform into one of the vessels that brings him the most pain: Oniguma, who died with hundreds of arrows pierced through his body and both eyes clawed.
Even as the enormous Oniguma, Fushi is forced into a corner as the monster easily steals his Oniguma vessel, leaving him with his last and arguably the weakest: March. Fushi pulls out the arrow that killed March and makes a mad dash for the trees. Because March was so good at climbing trees, Fushi successfully evades the branch-like tentacles, drops into the monster's body and yanks out the core that holds all of the stolen vessels. With those vessels returned, he finally feels like himself again.
The hooded figure appears before Fushi, introduces himself as his creator, and rather casually drops Fushi's reason for existing: his and the Maker's job is to preserve this world. That monster was created specifically to fight Fushi and will stop at nothing to prevent them from accomplishing their task.
It's unclear what "preserving this world" means and Fushi reacts to the proclamation humorously, barely batting an eye and calling the whole experience "weird." How much of an influence does the Maker have over Fushi? He has the ability stop time and motion but doesn't lift a finger to help Fushi while he's being attacked. If the Maker was the one who created Fushi and dropped him into the world, how does this help with their goal?
The Maker remarks that this monster has no sense of being and is considered "a failure of life," which might explain why it's specifically targeted at Fushi. Through every person he meets and subsequently every vessel he collects, Fushi is becoming more and more human. But by stealing Fushi's forms, it's stealing away his humanity.