1

1 is a blue anthropomorphic Number 1 with a darker blue eyelid. He has one eye similar to O and R, but with high-tech gadgetry. He also has a tiny cowlick at the top of the One symbol. His mouth moves similar to how a Muppet's mouth would. Lastly, he usually has visible one tooth in his mouth, but is sometimes seen with dentures. In 1, he is seen traveling in his Calculator to look for X on Z, and once he does, he goes to Z. Q sees a Calculator Ship coming towards Y, M, X, and B, then tries to rush to the Letters to tell them about the Ship. The Letters have eventually grown up and 1 arrives on Z. 1 scans Q with his pack, but finds that he isn't X, and his scanner indicates X behind. He then traps X in a circle and pulls X to him, leaving the others in shock.

In 2, the Letters team up to save X, with B blowing dust at 1, and M turning into his super form with his comma gem. M slows him down and punches him several times while Y launches X clones at him. After that, 1 "surrenders" and leaves Z as the Letters celebrate their victory. However, he arrives and traps the real X in a Calculator button that brings him up to the ship. 1 takes X's asterisk gem that causes the X clones to disappear, leaving Y in shock. 1 made a clone and they leave Z, but M slows them down with his gem. The Ones make 2 in the Math-Machine and the latter gains the upper hand over the Letters. 2 goes back to the Calculator and the Numbers blast off with X.

In 3, A, E, I, O, and U have a dance competition, but the Numbers blast through them. B tells the vowels about X being held captive, and the vowels team up to stop the Numbers. The Numbers are about to escape Z, but the latter sees the Numbers kidnapping X, so Z uses his ellipses gems to stop them, and they crash into that, causing the Numbers to land onto Z. 1's clone and 2 make 3 to fight g, J, and K. 3 easily defeats them, but L freezes 3 and shakes out X, the Math-Machine, 2, and the Ones, while O conjoins them with his colon gem. L sees a sad F and throws the Calculator at him, leaving N shocked.

In 4, when the Letters watch L and the VAN go to F's cave, 1 gets his pack and breaks the colon gem. The Numbers form a train with the Math-Machine and run over the Letters. 1 gets his clone and 3 to make 4, g messes with the machine, resulting in the creation of Bootleg 2, who falls off the machine in which 1 sees g and the BIKE. The Numbers regain control and make 4. She dives to the ground and takes the lead to stop the Letters. The Letters run into 4's tail, resulting in the front tire popping. O arrives and helps the Letters catch up to the Numbers while dodging 4's attacks. Once the Numbers made it to F's cave, 1 wonders what's happening and looks in binary code, showing N and O trying to stop F and L from escaping. He gets shocked that the Letters are hijacking the Calculator, and 4 makes roots underground to boost the Numbers up. 4 tries to restrain the ship, but it backfired as O's gem faded out. The Numbers watch in shock as the Letters leave with the Calculator.

In 5, the Numbers are falling, and 3 grabs the Numbers so he can turn into a balloon to make it to the top of F's cave. Once they landed, 1 yells about losing this Calculator as 2 suggests 1 to do something. he checks the map, but his pack is low on battery. P and G try to attack 1, but 3 pulls him to the Numbers as 4 protects the group from the Letters. The Letters attempt to attack the Numbers as they try to make 7, but to no avail as the Numbers failed because 1 didn't have any battery in his pack anymore. They switch to making 5, and the Numbers made 5 at the cost of 1's clone's life. The Numbers mourn 1's clone's death and become enraged at G for this. He pokes 5, but 5 smashes G into F's cave as E and I wonder what that was, leaving P shocked. When P comforts G as he dies, the Numbers watch without any remorse, except for 1, who sort of feels bad about this. After G died, P screams in anger and Z tries to reverse time to save G. The Numbers are shocked at what's happening right now and P is very angry over G's death. As she powers up, 1 runs away in fear and unleashes a screaming laser that doesn't do anything to 5. P breaks free from her cube, but due to 5's strength, he resists the laser and buffs up to knock P into outer space. P breaks Z's gems, and Z becomes shocked at this as he was unable to revive G.

Afterwards, debris starts falling on Z that almost hits several Letters. One of Z's gems falls on 5 as the Numbers back away, but 5 survives this and shows off his strength as the Numbers don't care, then he puts it dwon while knocking 1's clone's pack into the cave. 1 orders 4 to lift the cave as B,I,K,E, and O dodge her tail. 4's tendrils likely hurt R as he was unable to do anything. 1 then bequeathes X's gem to 5, who made an army of 5 clones that fall off of the cave as E and I watch in horror. BIKE reforms with Possessed N on K's eggs and O in his super form as the front wheel while they escape. The clones chase the Letters as they pick up V, A, U, W, C, and J. They try to pick up H, but failed since he was a ghost. They almost run over T, but he sees the chaos and joins the chase as T makes a hole for the Letters to escape underground. As a result, 4 successfully lifts the cave off Z and the clones of 5 use the equator as a throne for 1. Season 2 ends with 3 breathing fire on the tendrils as an obstacle, S eating the bits of Z's gems, and the clones returning to the Numbers. 1 shows to be quite intelligent, being able to pilot a ship to travel across the universe. He also appears to be a narcissist, due to feeling love for his late clone. His intentions are unknown...