"One-One, be careful!"
This article contains spoilers. It is recommended you watch the entire show before reading this article.
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Pilot
| The following information is from the pilot, which is not canon to the series. To see the texts, put the orb back where it belongs. |
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Book One - The Perennial Child
"The Grid Car"
One-One is seen by Tulip sitting atop a snowman. One-One questions if Tulip is his "mother", which she denies, but still befriends and takes along the journey home. He and Tulip play around in the Grid Car until a Gohm enters it, Tulip asking One-One to make a wall with a small hole around the door so they can exit the car without the Gohm following. One-One is successful in doing so, and they escape unharmed, beginning the trip to the engine.
"The Beach Car"
One-One is traded to the Cat in exchange for the aforementioned feline asking the Conductor to let her leave. One-One bids an unwilling farewell to Tulip, though Tulip feels immense grief and allies with Randall to chase down the Cat and break the deal. One-One is retrieved again.
"The Corgi Car"
One-One accidentally alerts the Steward to their location, though once the Steward realizes that One-One is present, it ceases its attack.
"The Crystal Car"
One-One tries to connect to the crystal through song, though his idea of a song is dial-up noises, so it fails. He sings with Tulip to make the Giant place the staircase up.
"The Cat's Car"
One-One briefly questions if a globe seen in The Cat's Car is his mother. One-One says "we don't like you." to The Cat before exiting the car.
"The Unfinished Car"
One-One's conductor instinct kicks in, seeing the sloppy work of Amelia and feeling a large necessity to "fix" the car. He ends up causing a massive hysteria with the citizens. One-One keeps telling himself that "it's [his] fault", likely referring to how he let Amelia take over and create sloppy cars such as this. Tulip makes him snap back to normal, and he apologizes.
"The Chrome Car"
One-One distracts the Mirror Police while Tulip convinces Mirror Tulip to help.
"The Ball Pit Car"
One-One has fun playing around until the Steward crashes the party. One-One is told to escape by a captive Tulip, who rolls into a tube, but the Steward opens fire and makes it appear as if One-One is dead. He is revealed to be okay after the Conductor and her subordinates leave, and tries to find a way to help Tulip restore Atticus.
"The Past Car"
He joins the Cat and Tulip in Amelia's tape. He is able to manipulate the tape to see more than what others would normally see.
"The Engine"
One-One finally reunites with the Infinity Train, conducting it once more. He opens a new exit for Tulip and bids a final farewell to her.
The Train Documentaries
As part of an effort to better acclimate new passengers to the train, One-One records various "documentaries" about all the cars.
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Book Two - Cracked Reflection
"The Black Market Car"
Mirror Tulip alters her appearance and continues to explore the train briefly watching a new passenger watching One-One's introduction video. After a narrow escape from the Mirror Police, Lake ends up in the Family Tree Car where she meets Alan Dracula and later Jesse.
"The Mall Car"
The Apex, most of whom boarded the train during Amelia's time as the Conductor, all claim that One-One is in fact a usurper and is telling them lies about how to get off the train.
"The Tape Car"
Mirror Tulip, in a bout of frustration after discovering she is unable to get a number, starts destroying the robots and equipment in the Passenger Preparation Car. She is interrupted by the arrival of the repaired Steward, whose head opens up to reveal One-One. Glad-One politely asks her to stop destroying everything, with Sad One adding if she doesn't, he will have to start writing her obituary.
"The Number Car"
One-One refuses Mirror Tulip's demand for a number or an exit door, claiming it is impossible for a denizen to leave the train. He reminds her that denizens are supposed to help passengers and she proved very helpful for Jesse. However, he is surprised to discover despite having a zero Jesse has returned to the train. Upon learning that Jesse's problem that brought him back was to help Mirror Tulip get off the train, One-One gets trapped in a paradox, where he cannot let Mirror Tulip off the train without a number, but he cannot solve Jesse's problem without letting her off the train. His distraction starts to damage the train, and in his confusion he hesitantly gives Agent Sieve permission to destroy Mirror Tulip. Finally, Mirror Tulip manages to convince One-One she has a number by reflecting Jesse's number off her hand. Satisfied, One-One opens a door that will allow both her and Jesse to exit. He witnesses Alan Dracula saving Mirror Tulip's life by destroying Agent Sieve, and Alan Dracula's sudden exit from the car back to his own. One-One comments that he really broke the mold with the deer.
Book Four - Duet
"The Twin Tapes"
When a passenger named Amelia Hughes made it to the front of the train, he showed her the purpose of the Train by showing the process of two boys named Ryan Akagi and Min-Gi Park. Amelia was confused that One was processing the two boys at the same time, but One explained that his algorithm has determined that this was the best course of action, as anything can happen on the train, given enough time. As One sent the two boys off, Amelia asked what would happen if the two boys don't sort their problems out, to which One calmly claimed that they'll die.
"The Party Car"
One is heard through the Steward announcing to the passengers, including Ryan and Min-Gi, that their belongings will be returned to them. Amelia is then heard commending One on this decision, though her remarks regarding this seem to imply that she coerced One in doing so.
"The Castle Car"
As time when on, Amelia begged One to a car with her deceased partner, Alrick, in it. However, he refused, as it was contrary to the rules and purpose of the train. Amelia responded by ripping him out of the control panel and sending him to the Snow Car. This action wiped One's memories and split him into dual personalities, dubbed "Sad One" and "Glad One", who together formed the entity of "One-One". One-One remained trapped in the Snow Car for thirty-three years while plagued with the persistent feeling that he was supposed to find his "mum."[1]