He was one of Lord Death's weapons, the Death Scythes. He transforms into a guillotine, a French execution tool. A mechanical & device type weapon. (A fanatical devotee who followed Lord Death obsessively.) Due to his priest-like attire, he is sometimes seen as a cult leader of the Shinigami faith. Four years ago, at the age of 13, he became the youngest Death Scythe alone without a single partner Meister. Thus, he is a very rare case of a Demon Weapon capable of fighting enemies solo. Considering that even a weapon's combat power usually becomes negligible without a Meister, he could be called an exceptional case. He always wears earphones and listens to music at high volumes, so his voice is loud. He cannot hear others, but he can communicate through lip-reading. He used to drive a coffin-shaped 'Dune Buggy'. It towed a coffin (a coffin-shaped prop) connected for loading at the back, giving off a unique atmosphere like a hearse. Reflecting Justin's fanatical love for music, it was equipped with massive speakers, and it was his daily routine to appear with the sound of music from afar. It was also used to transport injured comrades during missions. As one of the few weapons capable of solo combat, he is a very rare breed, especially considering that in this world, Demon Weapons generally cannot keep up with the combat abilities of a Meister who fights directly, making it much better for a Meister to use the weapon themselves. He mainly uses the guillotine blade as his primary means of attack. As a 'mechanical & installation type weapon,' he creates traps or handcuffs to bind opponents, or sets guillotine traps across an entire area. Fitting for the name guillotine, there is also a brutal combat method where he decapitates the opponent after binding them. His main finishing move is 'Law-Abiding Silver Gun,' which fires a powerful slash from the guillotine blade, strong enough to devastate the surrounding area. However, his limitation is that he is still just a solo weapon, not a Meister+Weapon duo, so he can be at a disadvantage against a duo that can grow stronger through 'Soul Resonance.' If the opponent is weaker than him, it might be fine, but against a powerful Meister of the same rank like Stein, or a Death Scythe similar to himself, he could be defeated before he can even act. Therefore, he overcomes these shortcomings through madness fusion with a Clown, as described later. — Justin became a traitor who betrayed the DWMA. The signs were visible when Giriko first detected the wavelength of madness in him. After the battle at Baba Yaga Castle, he persuaded Giriko to join him as a team, and that Clown was by his side. The god he truly serves is none other than the Kishin. His face, half-burned by Tezca's attack, seems to symbolize his character which has fallen to an irreversible degree. (Blue flames around the right eye + flames on the right shoulder) In short, he was lonely and so pure that he followed blindly without thought. As a result, he couldn't imagine a world without rules and succumbed to madness faster than anyone else, becoming corrupted. After joining the Kishin's side, he became a fanatic. His originally strong faith simply shifted its target from Lord Death to Kishin Asura. Thus, his dialogue sounds almost like a sermon, saying things like, "Lord Asura is the true God." Furthermore, his cruelty has increased significantly. If he fought because it was necessary before, he now has almost no hesitation in killing his opponents. The problem is that there was almost no one to hold him back. Justin was a solitary character by nature with few deep human relationships, and aside from Lord Death, there were almost no relationships depicted where he opened his heart. So when madness crept in, there was no one to tell him, "No."