Keller is a male Shinx specimen, later Luxray, that is one of the protagonists of Blink, Slowly together with his teammate Sasqūe.

The base character (see Character Concept) is intended to feature in his own set of stories as are the rest of the cast in Blink, Slowly.

Besides being a decent fighter, Keller is a good planner and organizer, and back in the day he was in charge of the team's expenses. Ever since a few months previous to Blink, Slowly, when it's been only him and his Lucario partner on the road, Keller used those skills to manage the team's resources and their handling of the case they were hired for by the Clefable Army. Eventually, Keller and Sasqūe were able to track down a goddess's hiding spot for the Army.

Keller has a stated ability to see beyond sight. This ability includes at the least a Luxray's ability to see things that are covered, thanks to their X-ray-like vision, which allows him to discern the three directions in which the Clefable airships turn to in a cloudy sky.

However this ability seems to also be tuned to detect the motion of any enemy within Keller's range, no matter the direction he's looking at. He states a few times that he can “always see all [his] enemies”, and he does prove this against Sasqūe in the story, but it's not determined if this is part of the ability common to all Luxray or if it is something unique to Keller.

A few decades before the contemporary events in Nrafhy-zmer, Keller was a recruit for the Garrison of the Oftborn, who assembled his own team and led them to rise among the ranks of the Gateguards, his team assigned to the northern end of tandunO Naparut.

At some point before or during Keller's station at tandunO, he was rescued from a life-risking situation by Ranba, a childhood acquaintance who now also worked for the Garrison as a Rescuer. Because of this event, Keller owes a life debt to Ranba that he expects to pay at some point.

Being a Gateguard in one of the northern World Scars, Keller and his team did not see much action, at least within the context of the Migration Wheel. He and his fellow team leaders were, however, privy to the religious confrontations between the archipelagos of Hedra and Tamilia, and the various leaders made recurrent effort to block either party from using the Scars as landbridges to attack each other.

Decades later, and at most a few years after the events of Owed Return , Keller and his team have moved on from their post as Gateguards and now work either as Explorers or as independent contractors, currently associated to a Clefable army. For undetermined reasons, the team is now involved in a protracted campaign to capture a strong Pokémon jailed at Tianji Aerie, on behalf of a third party who assures them the use of an Eltan Magic contract.

By this point, Keller and Sasqūe are the only members from the team left. They have surveilled the area for weeks in order to capture the strong Pokémon, but the Clefable army betrays them and the Eltan, and bombards the Aerie to take the strong Pokémon for themselves. Blink, Slowly )

Battered and left behind without their prize and without allies, Keller and Sasqūe can only watch as their former employers fly away. Keller says he can track their airships despite the cloudy weather (given his Luxray vision). He states that he can see “all enemies”. Looking to somehow complete the blood contract with the Eltan, Sasqūe snaps and tries to kill Keller, as the death of a strong Pokémon is required to activate the Eltan Magic. However, with both Pokémon very tired, the Lucario is unable to land a definitive attack: Keller outmanoeuvers him and kills him with a bite to the jugular.

It is undecided^{(meta/in-universe)} if the Eltan spell activated after that, or what was of Keller after the event.

Keller's species was chosen early to be that of a Shinx due to a combination of two factors: the overrepresentation of Riolu-Shinx teams in PMD fanfiction, and the innate vision ability that Luxray have, that would have pivotal significance in the end of the story, as one of the arc concepts for Blink, Slowly was that Keller was able to “see all his enemies”.

Keller is the first main character in a Suocéverse story to successfully carry out a kill in single combat; Inka had previously carried out a kill during a raid defense in Tricks of the Love Fast, only two weeks before Blink, Slowly was published.

Keller is the first Suocéverse character to kill a main character.

• Blink, Slowly (main character, debut)
• “Memory Child and the Oftborn” N/A?