Rou:
Rou, formerly Tomokui Kanata, was a human with an Esper ability. One day, he was killed by Kirimine Aoi, a childhood friend who became his stalker. Later, he wakes up only to find himself reincarnated as a Goblin, a Monster Species considered to be of the lowest class. His memories as a Human and his original Esper ability, Absorption, remained in him. Having a second chance at life, Rou is determined to live it to the fullest.
Personality
Rou is very intelligent, having an extraordinary amount of knowledge that he retains from his previous life. He is very cunning, using Goblins as sacrificial pawns and later as underlings. The first Goblin used this way is Gobukichi, who later becomes his right hand man. Despite this, he has a kind attitude towards his Goblin underlings, helping them learn to hunt, training them, and even encouraging them with gifts when they achieve something good.
He adapts easily to every situation and condition, which can be seen from his strategies to hunt and his ability to solve every problem. He also greatly hates doing something without "righteousness", unless it is important and required to survive. An example is when he is angry and uncomfortable when he sees the female Humans that were kidnapped in the cave, and repeatedly violated in order to produce more Goblin babies.
He doesn't like going into detailed explanations, he likes his food and booze. He's blunt and likes solving problems the easy way. At the same time, he's very intelligent (not that obvious with his speech/thought process) and actually pretty reasonable. It is shown he actually cares about those around him. It's like the concept that even if it's a tool, it should be maintained and well treated. He has a very deeply seated consistent Buddhist's version of compassion (it's closer to lay practice than the monastery version), as in, he doesn't really kill for the sake for killing, there's a purpose behind it (one aspect with the Buddha of mercy is the complete annihilation of your opponent, ie. cut him down and stomp on his skull, there's still a mural of it in Tibet. Killing for sustenance is actually well tolerated).
Appearance:
Goblin:
As a Goblin, Rou has the size of an elementary school kid with a bald head and green skin. He looks like an average typical Goblin, except for a canine protruding out from his mouth, and having a pointed eyelids.
Hobgoblin:
When he ranked up to Hobgoblin, he became closer in appearance to a human. He looks like his old self in his teenage years, having hair growing on his head. His skin became black because he is a Rare Variant kind of Hobgoblin that was blessed by one of the oldest Gods, the Great God of Origin and Demise.
Ogre:
As an Ogre, Rou's body remained black, he had unfamiliar red lines all over his body which resembled tattoos. His height was a full human arm length taller than that of an adult male (i.e. 2 meters and 50 centimeters) and he has developed 6-pack abs. His hair reached below his shoulder blades. Aside from growing longer, it has also turned gray. Lastly, two sharp horns had grown out from his forehead. When he touched them, they felt extremely hard. His genitalia has also greatly increased in size.
Apostle Lord:
When he became an Apostle Lord, Rou was around 50 centimeters shorter than when he was an Ogre (i.e. approximately 2 meters) but his muscles were many times denser making him at least a dozen times stronger. His black skin is the same, but the red tattoos on his body changed to a golden color. He has 3 horns that are stronger and sharper than before. His eyes turned blood red, the same color as Dhammi's, and can read from a book from nearly fifteen meters away. His hair had grown down to his waist and is silvery gray, which Spinel Fean had tied into a ponytail with golden thread. He also has 5 "Demon Orbs" buried in his chest, elbows, and both knees. the color was a mixture of black, red, and gold.
Vajrayaksa Overlord:
A bit taller than the Apostle Lord and instead of three horns he now have five which are also thicker. They have sharp edges and are slightly curved, extending as if they were trying to pierce the sky. It looks almost like a crown. His hair color became silver white and remained at the same length. Also his eyes color turned gold. Have another set of arms (now have four) the two new arms are located near the shoulder, just below the armpit. There are Demon Orbs in the center of his chest, in his four elbows and four hands, both knees, in his navel, and in both sides of his shoulders.
Enhanced Human:
They are espers that scientifically engineered too be stronger so they survive longer, meaning they look human but other than their esper abilities they are inhumanly strong, fast, etc.
True Fallen Dark Goblin King(Demon King):
The body that was an enhanced human became a goblin. The hair on my head is gone and has become a sleek, bald head with a luxurious crown on it. The crown is vaguely connected to a part of me, perhaps a type of bio-armor. I took out a mirror and looked at my face, and while it retains my previous appearance, the details have changed. It's probably like my appearance was applied to the goblin and changed. Even the mechanical arm that touches my face has changed, and the color is slightly black. It doesn't change in brilliance, strength, or functionality, even though the length seems to have been adjusted to fit my shrunken physique, but it's more integrated than ever before. Then there's one knee length loincloth on the lower half of my body, similar to what a Buddha statue wears. This is also like a bio-armor, smooth to the touch like silk, yet very sturdy. The design is also vaguely elegant. On such a loincloth there was also a string to hang the black dagger that was lying around my hand when I woke up. This black short-horn sword seems to be part of a biological weapon, and like the Vermillion Spear, it fits well in my hand.
Darkflame Demonic Royal - Great Hobgoblin King • Fallen Species(Great Demon King):
On my head, I have silvery hair that reaches to my shoulders, and the crown I wear has become more luxurious. The crown, with its magic-absorbing abilities, had many additional features that I could feel firsthand, but I would leave that aside for the moment. My small stature has grown significantly, to about 180 centimeters. I' ve grown all at once, but I can move with the same feeling I had when I was an enhanced human, so I fit in well with just light exercise. Both of his mechanical arms have become more muscular and his movements have become more agile. My pecs are bigger, my abs are six-pack, and my legs are thicker. His muscle mass seemed to be increasing visibly, and he could feel it when he exerted himself lightly or moved. The knee-length loincloth that wrapped my lower body, like that worn by Buddha statues, had improved in quality and became softer and smoother than before. In addition to furry parts of the gray wolf in some places, a black belt with head decorations similar to those of the gray wolf has been added. Could it be that it has taken in the ash-silver wolf? Since I didn't even know how the gray wolf itself was born, it wouldn't be strange if it had become one with me and become a biological armor after this incident. In fact, I haven't been able to confirm the appearance of the gray wolf since I woke up. And just like the situation that seems to have taken in the gray wolf, the [Gear of Fire Beast Group] also seems to have become a part of me. When I turn my face back, I see a black flaming flame - let's call it a black flame halo - floating on the back. The black flame halo burns around a six-pointed star that looks like a gear, and if you put magic power into it, it burns fiercely and seems to be able to create black demon beasts called "black flame demon beasts" from it.