Kon ~ The Lion plushie

Past:

The Mod-souls were the product of a Soul Society project called "Spearhead". The goal of the said project was to modify artificial souls so that they could be inserted into dead human bodies and turn them into foot soldiers or cannon fodder in the war against the Hollows. Each Mod-soul had a unique superpower meant to help it fight.

Kon was one of the last Mod-souls ever created. Shortly after his creation the project was deemed inhumane by Soul Society and was shut down. All of the existing mod-souls were to be terminated. Kon, however, made a lucky escape, along with some other Mod-soul pills, and wound up in the storage room of the Urahara Shop, inside a Soul Candy dispenser. Urahara placed the tainted dispenser in a box designated as "poor merchandise" and had intended to dispose of it but for some reason never did.

Kon's plushy body was a fake version of Ponkichi, the main character of a popular TV show called "Carnivore Kingdom" (肉食帝国, Nikushoku Teikoku). It was purchased in the Karakura Town Festival for a child instead of a more expensive, official version. The child who got it didn't like the cheap knock off, and so threw it away.

Agent of Shinigami arc:

When Rukia realizes she won't have much more time in the living world before the Gotei 13 send someone after her, she decides to find a way for Ichigo to transform into a Shinigami without her help. For this reason she goes to the Urahara Shop and buys a dispenser of soul candy, which Ururu fetches from storage. Later, in school, Rukia drags Ichigo to a secluded corner and forces him to take one of the pills. Sure enough, Ichigo's soul is pushed out of his body and his body is now controlled by what seems to be an Artificial soul. Right then, Rukia's Hollow alarm goes off, and the two leave Ichigo's body in the hands of the supposed Artificial Soul, despite Ichigo's mistrust.

At about that time, Kisuke Urahara discovers that the dispenser he sold to Rukia was a faulty one, containing Mod-souls instead of soul candy, which Ururu delivered by mistake. He and his employees decide to set out and find it.

The Mod-soul, finding himself for the first time in a Human body, decides to hijack Ichigo's body for his pleasure and amusement. He wows a teacher by jumping over his head onto a rooftop 20 yards away. Next he surprises the girls in Ichigo's classroom by jumping up to the 3rd floor window from the ground. He makes a move on Orihime and kisses Tatsuki, throwing her into a fit of rage. Ichigo and Rukia return in time to find school desks flying through the window, they try to corner the Mod-soul but he jumps down from the window and runs away.

The Mod-soul goes off on a spree, leaping high and far through the air. His spree brings him near Ichigo's younger sisters' school, where he encounters three boys - Hashigami, Kaneda and Ino - who cut from gym class to play video games. He is enraged by the callous way the boys delete the game characters they created. He attacks the boys and breaks their game console. Later, as he makes his way away from the school, he senses a Hollow near the place he just left and doubles back, arriving just in time to drag the three boys out of harm's way. Rukia and Ichigo, in their search for the Hollow are surprised to find the Mod-soul, in Ichigo's body, taking a beating against it. Ichigo and the Mod-soul destroy the Hollow together, but the Hollow's falling body threatened to crush a trail of ants, so the Mod-soul kicks it away, putting himself and Ichigo's body at risk of falling off the roof. He later says that he refuses to kill anything or allow anything to be killed, because he feels anything has the right to live and die freely.

When Urahara arrives to retrieve his "poor merchandise", Ichigo and Rukia decide to keep the Mod-soul as the permanent means to replace Ichigo's soul, and agree to claim responsibility over the Mod-soul. They later find a lion plushy for the Mod-soul to reside in while not in use. Unexpectedly, the plushy comes to life, and Ichigo orders him to not reveal himself to the rest of the household. Ichigo chooses 'Kon', short for Kaizō Konpaku (instead of 'Kai', which sounded too cool) for the Mod-soul's name.

During the fight between Ichigo and Grand Fisher Rukia puts him into Ichigo's body to help her carry Ichigo's sisters. He later asks Rukia to go help Ichigo as a favor.

When he is fed up with the pains of living in the Kurosaki Clinic, he decides to run away but comes back after finding nowhere better.

When Uryū Ishida challenges Ichigo to a duel, Ichigo uses Kon to Transform. He later stops a Hollow from attacking Rukia and then confronts Uryū about creating the crisis for the sake of challenging Ichigo.

Before escaping the Kurosaki Clinic, Rukia tapes Kon to the bathroom to keep him from telling Ichigo of her escape, he later helps Ichigo decipher the coded note she left. Before leaving to help Rukia, Ichigo uses Kon to transform.

When Ichigo and his companions depart for Soul Society, Kon wishes to come along, but instead Ichigo leaves him in charge of his body and asks him to take care of his family.

Soul Society arc:

Kon is recruited by Don Kanonji to the Karakura Superheroes and receives the name Karakura King. The team members use him as a crash test dummy for painful, seemingly useless and unnecessary experiments. Kon jumps from the frying pan into the fire though, when he decides to quit and gets himself abducted by a female Hollow who wants to keep him as a pet. The Hollow is finally vanquished by the team with Kon utilized as the weapon: Passed from Ururu like a volleyball to Jinta, hit by a Jinta Homerun towards Karin and finally kicked at the Hollow with the Karin Impact Kick.

Arrancar arc:

While Ichigo is off fighting in Hueco Mundo, Urahara makes Kon an offer to make him into a super hero to fight the Hollows in Karakura Town. Kon initially refuses, but jumps at the chance when Kisuke mentions he could become a 'babe magnet'. He becomes Konso Cop karakuraizer, and Urahara provides a background story for him: Kon, an evil space alien hiding among inhabitants of earth in order to carry out nefarious schemes, is captured by Dr. Urahara, a scientist on the side of justice, and turns him into the superhero karakura konso cop. Now, to return to his old alien self, he must lay to rest the 108 hollows that murdered Dr. Urahara's daughter!

He first destroys a large Hollow called Zonzain with his riserbeam. When other Hollow arrive so does the karakuraizer-team.Together with his team he destroys every hollow but then they spot a large fortress flying in the air.

After the destruction of the Hollows fortress, Kon soon falls asleep as Urahara's plans are completed for the final showdown in Karakura Town.