Kronker

From just the look of things, it was quite clear that the demon was of the Durum race, but the demon king looked quite different compared to all the others. First of all, the amount of red crystal that was hardened over all of its body. Although there was a human shape, it was hard to even see any human parts, or anything that resembled skin, as the legs, arms, and torso were completely made out of the red crystal, even the teeth. As he has a sharp jagged rock-like teeth that seemed to be made of the same type of red crystal the other demons had, and it was hard to tell exactly what he was saying as the words were spoken through. It was only part of the face near that of the eyes that had a little bit of skin. Then there was its large back, it was even larger than the demon general, and truly looked like there was a shell of some sort on its body. It made the sheer size of the demon look around two times bigger, even though it was only a little bigger than its counterparts, but smaller than the champion C alva. Demon Form In Demon Transformation, the energy seeped out of Kronker, as his body was starting to change. All of the hard crystals that covered his body started to light up, they grew slightly bigger and when they reached a certain point, the crystals started to crack. It started from his chest, then they were cracking all over, until eventually they burst, breaking out into a tiny million glitter shards that just fell to the floor. The scene looked almost like a bird

The demon king Kronker first appeared, when Quinn's clone invaded the place where the Champion of Skully, Calva was locked. As he was the incharge of guarding him. He appeared from a magic circle on the ground. When being summoned, Quinn's clone attacked him, but the first time an attack from the clone hadn't even left a scratch on the demon's body. That attacked made him aware that Quinn was sometime type of demon, as the energy he was using, it feels familiar, yet different at the same time. He first thought of Quinn's clone as a new creation created from Immortui's power, that wanted to challenge him and used the invading method to forcefully summon him. He also thought of the demon in front of him 'which was obviously Quinn's clone' being weak. At first he was going easy and at last, the moment one of the crystal shards went through its body, it had exploded into nothing but a cloud of smoke. It was hard even for him to believe that the demon was died from a simple attack. He then teleported with Calva to the base camp of the hunting ground. When he appeared he noticed the dead demons that were spread out on the ground, with several sword-like marks on their bodies. As he looked up his eyes feel on the person who was killed by him, at that moment he thought he was in luck. He happened to come to where the person had escaped to, which means he could finish him off. But soon the look on Kronker's face had completely changed due to Quinn releasing his blood aura. Later, he was beaten up by the real Quinn without him giving a change, when he stopped there were large differences in his appearance. There were multiple cracks on the crystals all over his body, and a few shards looked to have even fallen off. Due to the frustration, he activated his demon transformation. When the transformation completed, he chucked but his confident laugh though had come to an abrupt end, as he noticed something strange was happening. As due to his transformation, the demon energy spread through the air and the ground had reached Quinn who was forcefully transformed into his Vampire demon form. Even in the demon form, he was overpowered by Quinn in his form. At the end, he was defeated but not before putting some resistance by using all of his power into a final attack, after this he would have nothing left to give, so if this didn't defeat Quinn, then the fight was over. But