Kon

is an artificial soul modifeid by a Soul Society project known as "Spearhead" to inhabit a dead body and use his special powers to help the Shinigami fight Hollows, Kon's special power is in his leg muscles. His name is a short for. Ichigo uses him to transform into his Shinigami form, leaving him in charge of his body the way normal Shinigami use artificial souls to look after their gigais. When not serving this purpose, Kon usually inhabits a lion plushy, which he refers to as his "sexy body".

Character Outline
Kon primarily serves as a comedic foil in the series; when not inhabiting Ichigo's body, his normal plushy body is treated with little respect and much disdain, sometimes bordering on abuse. He is constantly stepped on and torn, which forces Ichigo will take him to Uryū for repairs. Uryū will usually add something unwanted or unnecessary while doing so, such as dressing Kon up like a designer doll and sewing a Quincy cross to the back of Kon's head.

Kon is quite perverted and is preoccupied by sex much of the time. He will often try to take advantage of his plushy body to get girls to hug him to their chests. Kon is especially attracted to girls with large breasts, which makes Orihime the center of many of his fantasies. In the manga he is also seen using Ichigo's body to gratify himself while fantasizing about Orihime and Rukia.

Kon's redeeming quality, which allows Ichigo and Rukia to see him as someone worth saving, is his views on the sanctity of life. Because he spent many years in the form of a pill, fearful that one day he would be discovered and disposed of, Kon has developed a moral stance that prevents him from killing anything. He will also risk his own life in order to save even the lowliest of creatures, and is angered to see people who belittle their creations and dispose of them off-hand.

Kon admires Rukia a great deal, and feels grateful to her for saving his life (when Urahara wanted to dispose of him). He refers to her as "nee-san", or older sister in the English version. She seems to not return his affection, and will usually ignore him unless he offends her somehow.

While in the Kurosaki Clinic Kon is "adopted" by Yuzu, for whom he is nothing more than a stuffed animal. Yuzu refers to him as a female and calls him "Bostov". He is mortified by her choices of attire for him, but seems to genuinely care about her feelings when she cries herself to sleep worrying about Ichigo while he is training with the Vizards.

History
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 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 the existing mod-souls were to be terminated. Kon however makes a lucky escape, along with other Mod-soul pills, and winds 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 is a fake version of Ponkichi, the main character of a popular TV show called "Carnivore Kingdom". 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, that 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 callas 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 harms 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 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 return 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 Konhim 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
When Rukia decides to leave Karakura in order to protect Ichigo, Kon tries to stop her, but she ties him to the Kurosaki's toilet and gags him. When Ichigo, Orihime, Chad, and Uryū decide to go after Rukia, Kon tries to join them in Ichigo's body, but Ichigo makes him stay behind.

In the meantime, Kon is recruited by Don Kanonji as Karakura King in his Karakura Superheroes team. He serves as a soccer ball for Karin's special attack, the Karin Impact Kick.

Bount arc (anime only)
Note: Events occurring in this arc are only in the anime and do not constitute canon material.

At the beginning, Kon meets his fellow modified souls, Ririn, Kurōdo and Noba. He does not get along well with his new companions. Ririn views him as a fool and they often fight, and Kon is jealous of Kurōdo's assignment to guard Orihime. They do work together, however, most notably when they collaborate in the construction of several elaborate, yet useless, anti-doll traps.

When the Bounts infiltrate Soul Society, Kon joins Ichigo and the others to find them (partly due to fear of falling victim to Don Kanonji if he stayed behind in the real world again). Kon gets separated from the group in Rukongai and settles temporarily with a woman who owns a coffee shop. In contrast to Kon's usual lack of luck with women, this woman takes a shine to him. He eventually leaves to help fight the Bount, but continually arrives after the battles. After meeting up with everyone again (which is depicted during the non-sequitor previews for the next episodes), Kon brags about his stay with the woman, only to find out from Jūshirō Ukitake that it was actually a cross-dressing man.

Arrancar arc
With the Arrancar invasion beginning, Kon takes over Ichigo's body to have a little fun on the town, only to run into Grand Fisher. He is saved by the timely re-emergence of Isshin Kurosaki, Ichigo's father, as a Shinigami. Isshin quickly dispatches Grand Fisher with ease and Kon is forced to keep Isshin's true identity secret. Isshin reveals that he knew about Kon ever since meeting him during Grand Fisher's first attack at the graveyard.

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

Powers & Abilities
Enhanced Strength: During the few times that Kon is in combat, he has proven to be able to hold his own — in addition to possessing all the combat abilities of Ichigo's well-trained body, he was designed to have exceptionally powerful leg strength. He was able to fend Ichigo off in combat by using just kick-attacks and leg-blocks, and is able to kick aside massive Hollows. He is also capable of jumping over 13 meters and 56 cm from standing position in Ichigo's body.

Enhanced Speed: Despite his size in his plushie form, he can run 100 meters in 3.8 seconds while in it.

Spiritual Power: Being a modsoul, Kon possesses some spiritual power, though not as much as spiritually aware Humans, such as Yasutora Sado or Orihime Inoue.

Trivia

 * His theme song, as chosen by Tite Kubo, is "Nichiyoubi Dansu" by Kuuki Koudan (Kon Theme #1) and "Bushman" by Rip Slyme (Kon Theme #2)

Quotes

 * (After Rukia Kuchiki stepped on him and he looked up her skirt) "Nice angle!"
 * (About Yuzu missing Ichigo) "How could you make this poor kid cry? What a worthless brother!"
 * (Daydreaming about being smothered by women) "Extra large...puffy wuffy...booby woobies!"