"Shoot em up! Shoot em up!"

Shintarou Jagasaki is the main protagonist of the Jagaaaaaan manga. He works as a night patrol officer of Buppa City Police Department who, one day, was infected with a frenzied tadpole and became The Fractured Human Warrior "Jagaaaaaan", allowing him to obtain the ability to turn his right arm into the gun arm Jagan and meet his Partner, the Roving Owl Doku.

As Jagasaki constantly evolves in the series, to give a better idea of where he's at, the feats will be marked with a form. Below is a brief description of each of Jagasaki's forms thus far.

First Form - Jagasaki's first form is his regular human form. This allows him to look like a completely normal police officer.

Second Form - Jagasaki's second form is where the actual transformations start. This form is the basis of the Jagan's transformations, which allows it to transform into different versions of Jagan. This forms transformations end just below the shoulder and still allow Jagasaki full awareness and empathy.

Third Form - Jagasaki's third form's transformations ends around the face and chest area and allow Jagasaki moderate awareness and empathy. In this form, Jagasaki's bullets become much more powerful, as they are able to pass through much stronger material, even being able to shoot through and explode the head of Kashikomarionette, who's head was around five times the size of Jagasaki's whole body. This form allows moderate awareness and moderate empathy.

Fourth Form - Jagasaki's fourth form is the closest he has come to fracturing. This form transforms most of his body with growths coming out of his back and allows him low awareness and empathy. Unlike the other forms, this form has the passive ability of giving Jagasaki himself increased strength, endurance, agility, regeneration, an eye patch with scope-like properties and the ability to use multiple Jagan forms at once. Along with the draw back of becoming almost fractured, if turned back into his human form afterwards, his body will require rest due to the energy that was used in the transformation and possible weaponry used, sometimes even resulting in Jagasaki passing out from fatigue. This form is so powerful that Jagasaki can take on and even kill evolved fractured humans, which are unique in that it would usually take multiple fractured human warriors to kill these creatures. This form can also only be brought about if in an intense emotional situation, like being near death, or if near his trigger, Bell. This form allows moderate awareness and low empathy.

Fifth Form - This atomic reactor of desire is the strongest form of Jagasaki yet, combining his Jagan and Cell Manipulation abilities to maintain it. This form covers his chest, right side of his head and his entire arm in fractured cells and creates a storage deposit for energy in said areas, in the chest however, his storage deposit is specifically his heart. These energy deposits are in a circular shape, are reflective and also have large veins connecting each of them. His eyes, instead of gaining a black sclera, has his left stay normal and his right gain the circular storage deposit, resembling a goggle. Jagasaki also gains the side effect of emitting lightning-like energy and a mist of dead fractured cells from his body, most likely a bi-product of the excess desires being stored up, turned into energy as it exits his body, and the killing of fractured cells, due to cell manipulation, causing them to flake off of his body in a mist. This form, unlike the other forms, seemingly have far less negative drawbacks due to Jagasaki seeming like his normal human self once completing his transformation, seeming much more like his human form in term of awareness and empathy. This is most likely due to how he can now control his power completely, meaning that he can keep it from causing him to lose his humanity. Jagasaki can now seemingly enter this form at will, without having to go through the others first.

Due to the frenzied tadpole infecting him, Jagasaki is able to turn his right arm in to a fractured gun arm, known as Jagan. When fired, the Jagan shoots out an organic bullet

Handgun

Jagasaki's first transformation for jagan was it's handgun form. It transforms by conjoining his index and middle finger with a hole at the end of the conjoint mass, acting as the muzzle for the bullet to shoot out of, causing it to resemble that of a handgun. Any living thing that the bullet hits will explode into a mess of gore upon impact, making it a very powerful weapon.

• Blows away a Fractured Human. The Fractured Human was fast enough to kill several people in the blink of an eye

• Blows up the owl, Doku

• Destroys the torso of a Fractured Human

• Flings Shakuntani off of a roof

• Blows off Fractured Aruko's head

• Launches Pino. The shot flung Pino hard enough to knock a considerably sized hole in a wall

Cannon Jagan

Not much is known about this form, as it isn't used much and is mainly used for utility, but it is known that this form shoots a powerful rocket that can blast Jagasaki into the air by at least 10 meters. This form engulfs Jagasaki's entire hand and has a massive hole for the rocket to exit out of.Jagasaki obtained this form after he transformed without knowing and narrowly avoided a lethal blow from Reina Ikegami by blasting himself out of a window. This was when he figured out he could change Jagan into different weapon types.

• Pushes himself away from a Fractured Human

• Blows a large hole through a school roof

• Prepares to fire onto Shakuntani but uses it to quickly save Bell

Sniper Jagan

This form engulfs his entire hand (and arm if in his third form) and has an extended barrel, due to it's sniper-like properties. Unlike Jagasaki's other Jagan forms, this version has a scope which allows him to be more accurate against any fractured humans, like Reina Ikegami who ran as fast as a horse. The drawback to this however is that Sniper Jagan is quite cumbersome, as Jagasaki usually needs to stay still as he aims and cannot move very far while Jagan is in this form.

• One shots a fast Fractured Human

• Immediately kills a Fractured Human as it transforms

• Blows the head off of a giant Fractured Human

Palm Jagan

This form is very similar to Pistol Jagan, as it has the same power as the pistol form, but instead of the barrel being at the conjoint index and middle finger, it is on the palm. This form is seemingly only used for the purposes of escaping constriction.

• Frees himself from Chiharu's wood prison. Chiharu's wood was strong enough to easily catch a shot from Jagasaki's handgun

• Fires a piercing bolt at the fully Fractured Misogi

Rocket Jagan

This weapon sprouted from Jagasaki in his fourth form. Unlike Cannon Jagan, Rocket Jagan seems to actually be used as a weapon by Jagasaki and can fire 4 rockets at once at the intended target in it's quad rocket form. Alternatively, it can be fused into one singular rocket to completely destroy a single area or being.

• Knocks chunks out of Shakuntani

• Smashes Shakuntani into the ground

• Creates a small rocket board that allows him extreme mobility

• Fires homing missiles that track Yukimura

Mini Gun Jagan

This weapon sprouted from Jagasaki in his fourth form. Jagasaki seems to need to hold on to this weapon with both hands as he fires it, most likely to reduce the recoil and due to how heavy the weapon probably is. This weapon has the fastest rate of fire in Jagasaki's arsenal.

• Peppers a Fractured Human with bullets

Revolver Jagan

This weapon sprouted from Jagasaki in his fourth form. Jagasaki has only been shown firing this weapon a couple of times and may to function similarly to pistol Jagan.

Winged Jagan

One of the non weapon type forms of Jagan, Winged Jagan turns both of Jagasaki's arms into wings. The arm wings resemble a more bird like appendage. This allows him to gain the extremely useful ability of flight, as this gives him the height and evasion advantage when fighting his enemies, as shown in Jagasaki's fight with Shakuntani when he could barely fight against Jagasaki while in this form.

• Leaps high above a school building

Scope Jagan

One of the non weapon type forms of Jagan, Scope Jagan sprouts a telescope like appendage. This scope can either sprout out of Jagasaki's right arm, or directly on his right eye, if in his fourth form. This allows him to look through it to zoom his sight in on an area, without weighing him down like sniper Jagan.

• Can be used without forming the rifle

• Tags a fleeing Yukimura. Yukimura is fast enough to dodge Jagasaki's shots and states he has a "spinal reflex"

Tentacle Jagan

Tentacle Jagan causes Jagasaki's body to sprout tentacles from his back (either as secondary weapons, armor or simple aesthetics) and turn his arm into a larger version of Sniper Jagan. This form seems to be one of the more powerful forms that Jagasaki can form. It is able to shoot possibly farther than Sniper Jagan and can even pierce the thick armor of Takkun's shield sword.

• Fires a shot across the city and punches a hole in a massive Fractured Human. The same Fractured Human revived itself after being cut to bits by Cut Woman

Jet Jagan

One of the non weapon types of Jagan, Jet Jagan turns Jagasaki's arm into an engine. This allows Jagasaki to move at incredible speeds, allowing him to dodge and counter foes with ease.

• Saves a mother and child from a Fractured Human. The Fractured Human attacking them was quick enough to dodge a nearly point blank shot from Jagasaki

• Saves a man from being hit by a Fractured Human's attack

• Saves Nakadai

• Leaps across a long tightrope

Trident Jagan

A form specifically made for piercing through the toughest of materials, Trident Jagan incorporates the use of Jagan's piercing rounds and Jagasaki entering his fourth form. This Form of Jagan has enough piercing power to go straight through the head of Misogi Hakuto's berserker Misogideon form.

• Punches through the fully Fractured Misogi's head. For reference, Jagasaki's pistol did absolutely nothing

Dragon Jagan

The most powerful Jagan form yet, the Dragon Jagan form is created by Jagasaki redirecting his growths to make a small jet plane in the appearance of a Chinese Dragon's head with the energy from Jagasaki being expelled through the exhaust and a large gun formed in the mouth. Through a combination of the high speed and sharp teeth of this form, it can even go straight through the steel-like armour of Misogi Hakuto's Beserker Misogideon. The two big drawbacks from this form of Jagan are that it requires Jagasaki to enter his fourth form, as it is the only way he can build up this much mass and energy. this will mean however that not only will he collapse from exhaustion after using it, but he will also need either a large amount of Duhnng-Balls or have Yuma Kujou destroy the fractured cells faster than they can fracture Jagasaki. The other drawback is that Jagasaki will need to build up vast quantities of energy if he wishes to stay in the sky, meaning that if he were to need to fire at an opponent, he will be unable to until he can guarantee he can take them out in one shot. With the combination of him going into his fourth form and using so much energy, using this form of Jagan can put Jagasaki in a coma, which can last for around two weeks.

• Creates a jet-like dragon head that carries himself and Yumama

• Forms a massive dragon that destroys the upper body of fully Fractured Misogi

• Tears a chunk off of the pillar Pino was standing on

Domination Jagan

Possibly the second most powerful form of Jagan, Domination Jagan was created by combining Jagan with his newly discovered cell manipulation power and intitially entering his reborn form. This allowed him to destroy fractured human cells faster than they could fully fracture him, allowing him to create a more powerful weapon out of Jagan. This form of Jagan is able to store massive amounts of energy, much like Dragon Jagan to a lesser extent, allowing him to shoot bullets powerful enough to pierce the carbon skin of Mikazuchi Takemitsu.

• Pierces Mikazuchi's carbon skin. Mikazuchi stated his skin is "ten times the hardness of diamond"

• Can be moved through its target and controlled by Jagasaki

• Spreads like an infection when it hits. The effect may be unhealable as Yumama was not able to repair Mikazuchi's arm after he was shot with it

• Merges several shots together to form a large bomb

• Fires four shots that act as tracking beacons to hone in on the extremely fast Chongirou and is eventually able to tag him with a shot

• Explains he can use the Domination Jagan to plant a bullet inside someone. He then plants a bullet inside a Fractured Human with the intent to use him as a puppet

• After implanting Yukimura with a bullet, can see through his eyes

• Can create miniature "camera bullets"

Blunt

• Takes one on the cheek from Misogi Hakuto. Misogi's transformed punches could destroy the heads of Fractured Humans

• Decked by the fully Fractured Misogi

Electrical

• Blasted by the fully Fractured Misogi

Fire

• Smashes Pino into a large train and holds him in the flames

General

• Hit and flung by a crossbow shot from a Fractured Human. A shot from the same crossbow was enough to down a normal human

• Has his arm ripped off by Pino

Healing Factor

• Chiharu states Jagasaki could heal "until every last bit is dead"

Piercing

• Impaled by the teeth of a massive Fractured Human. He escapes the Fractured Human's mouth by evolving into his Fourth Form

• Stabbed in the back by Mikazuchi

Slashing

• Has his arm cut off by Mikazuchi. This happened again later when Jagasaki was infected by Pino's bacteria effect and Mikazuchi chopped off a chunk of his arm to stop it.

• Blocks a strike from Mikazuchi. Of note, Mikazuchi is fast enough to catch one of Jagasaki's bullets and can easily decapitate Fractured Humans

Movement

• Outruns Shankuntani

Dodging

• Rolls away from Chiharu's punch

• Avoids a broad slap from Misogi by shooting the ground. He also does this to avoid being crushed

• Avoids a strike from Chongirou. He continues to do this throughout their fight despite Chongirou's constant power ups that allow him to move fast enough to create afterimages

• Rolls away from a web attack

• Backsteps a pair of surprise attacks

• Zips past Yukimura. Yukimura is fast enough to quickly murder an entire group of Fractured Humans

Fighting Ability

• Accurately and covertly kills a Fractured Human

• Fires quickly and tags a Fractured Human

• Fights Chongirou at high speeds. Even when Chongirou is at full power, Jagasaki is able to predict and narrowly avoid his attacks

• Battles Pino over Deader Land

• Baits and quickly kills several hostage taking clowns