The Beholder

The Beholder (観察者, Kansatsu-sha) is Fushi's creator and the narrator of To Your Eternity. After Fushi's triumph over the Nokkers, he moves into a human body and lives as a young boy named "Satoru".

Background
A being of unknown origins, the Beholder is a mysterious, otherworldly entity who drops the Orb onto the earth and tasks it to preserve and protect the world from the Nokkers.

Appearance
Originally, the Beholder appeared as a pale mannequin-like humanoid, with no visible hair or marks on his skin. His face was largely expressionless and rarely moved, even when talking, and he wore a long, hooded black cloak that covered most of his body.

After being reborn as Satoru, he takes on the appearance of a young boy and is notably a lot shorter than before. He now has black hair that reaches the base of his neck and long bangs, along with thin eyebrows to accentuate his sharp, slanted eyes. He usually wears plain clothes consisting of a pair of baggy shorts and an oversized t-shirt.

Personality
Fitting of his inhuman nature, the Beholder is a strictly rational and analytical being who rarely takes direct action himself, but instead advocates for anything that promotes Fushi's growth. Though he shows almost no emotion, he expresses visible satisfaction whenever Fushi shows remarkable progress.

He appears to have a strong understanding of humans, often explaining them to Fushi in a purely descriptive manner devoid of judgment or morals, but as his name also alludes to, he spends most of the time observing Fushi and often withholds information from him, deeming the experience he gains more valuable than merely telling him everything.

Even after his reincarnation, his personality remains largely unchanged. While he enjoys the pleasures of being a human, such as eating nice food and taking baths, he remains near expressionless and as mechanically rational as ever, choosing not to interfere in Fushi's affairs.

Abilities
The Beholder is responsible for creating the "orb" that became Fushi, but is also capable of assimilating others' fye into orbs, allowing them to reincarnate into other beings. In Pioran's case, her form took on that of a white horse with impressive regenerative abilities.
 * Orb Creation and Reincarnation

The Beholder is capable of forcing Fushi to transform into any forms he possesses, but rarely uses it unless Fushi puts himself in deliberate danger.
 * Controlling Fushi

The Beholder, even as Satoru, has the near godlike ability to control and alter anything tangible, even human bodies. It appears as long as the object in question is in close proximity to him, he doesn't need to physically touch it, and has even transformed inanimate objects to living creatures.
 * Matter Manipulation

His feats include removing a sword from his body and crushing it without moving, and stopping a Nokker-possessed Funa, in which he held her in place mid-air, transformed her weapon into a bird, turned her into a flower from which he then telekinetically ripped out the tiny Nokker inside, and finally incinerated it with fire from his hand.

Former Abilities
The Beholder originally had the power to connect himself to the ground and could sense the Nokkers by singling out any foreign bodies he found. In addition, he could send his consciousness to other bodies he created, detaching and reattaching to his network at will, granting him near unhindered omnipresence. He eventually passed on his power to reconnect to Fushi, making him unable to return to his former body or utilize his network to sense the Nokkers.
 * Territory Domination

Quotes

 * "I will eventually die. It is essential that by that time, you become capable of fighting alone against the enemy. That is how my goal will eventually be accomplished." - To Fushi about his intentions.
 * "As small eggs, you cannot notice them, but once they hatch, you are subject to great unease." - Describing how he senses Nokkers.

Trivia

 * Although Fushi is normally the only one that can see and communicate with him, the Beholder is capable of manifesting before other people as well, such as in the case of Pioran.
 * The Beholder is interestingly still subject to change by his own observation of "when the vessel changes, so does the heart", as despite being good with numbers as the Beholder, his Satoru incarnation is not.