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 the fake copy of the main character of the popular TV show, "Carnivore Kingdom" named "Ponkichi". It was a prize from the shooting game in the Karakura Town Festival.

Agent of Shinigami Arc
Kon's first appearance is shortly after Rukia Kuchiki and Ichigo obtain a like item known as Soul Candy from the Urahara Shop, which are candy-like orbs stored in dispensers similar to those Pez come in. The Soul Candy, when ingested, forces Ichigo's soul out of his body and replaces it with an artificial, pre-programmed soul, allowing Ichigo to transform if Rukia is not around.

Unbeknownst to everyone (including the Urahara Shop's employees), the particular Soul Candy dispenser Urahara gives Rukia had been declared defective by Soul Society, as it was made from a batch meant to be turned in for destruction. These pills contained mod souls, artificially created souls designed to combat Hollows. Additionally, these souls have personalities, unlike the common artificial souls. Each modified soul was designed to have their own special strengths; in Kon's case, his legs. Upon first testing the item, Ichigo and Rukia leave it to its own devices while they go to fight a Hollow.

The mod soul, now free and having no desire to return to its pill form, goes on a mischievous and damaging (to Ichigo's reputation) rampage, diverting Ichigo from the pursuit of a particularly dangerous Hollow. The pair clash a few times during the course of the mod soul's spree, and would have continued had not the Hollow chosen to appear and attack a group of children nearby. The mod soul acts on its instincts, attacking the Hollow and giving Ichigo the time to defeat it.

Afterwards, Ichigo has a talk with the mod soul, who explains that he just wants to be free and experience life, similar to that of a real soul. Taking pity on him, Rukia and Ichigo ignore the standing directive to destroy all mod souls; they instead stick the mod soul into a lion plushie after failing to find a dead animal, or more specifically, a roadkill cat, giving it life. Ichigo gives the mod soul the name of Kon shortly thereafter, despite Kon's protests.

After this point, Ichigo uses Kon in the same manner as regular Soul Candy. When Uryū Ishida challenges Ichigo to a duel, the winner being decided by who could kill the most Hollows, Kon is given charge of Ichigo's body. He joins in the fight around Karakura to defeat Hollows, saving an ambushed Rukia. He later watches as Ichigo and Uryū team up to defeat a Menos Grande.

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!"