I Isekai'd as a "devil" that saved the world

~1~ The Beginning

On a peaceful night, with nothing but the wind blowing through the rolling fields of grassland, the stars glittered brightly in the sky. However, amongst them, one particular star appeared to shine brighter than the rest, its light beckoning to something unknown.

In the stillness of that cold night, a flash of brilliant light suddenly illuminated the field of grassland, slamming into the ground with great force. However, when the beam finally faded away, there was no crater or damage left behind. Still and motionless, a humanoid figure lay dormant on the chilly grassland. The figure had short ashy hair and was completely nude, their body exposed to the chilly night. The beam which once illuminated the field was now gone, leaving the figure's origins a complete mystery.

As the figure's yellow eyes slowly opened, they seemed to look left and right in confusion, trying to figure out their location. Seemingly unconscious of their well-being, they slowly sat up and stretched their fists and arms. The figure remained incredibly still and still spoke not a single word. They appeared completely focused on taking in the surroundings, trying to figure out their current situation.

In the distant grassland, torches could be seen moving closer and closer to the figure's location. The torches illuminated the area, becoming brighter and more vivid as they approached the figure. A group of villagers living nearby had been drawn to the scene, and they approached the nude figure with swords drawn, their eyes locking onto his bright yellow eyes.

The villagers were perplexed by the figure's bright yellow eyes, and one of them voiced their confusion, "I have never seen such bright eyes... It doesn't seem human." Another villager, seemingly the leader of the group, addressed the figure more directly, "State yourself! Who are you, were you the one who emitted this huge beam from the sky?"

The figure was left visibly confused by the words and sentences being directed at them. "H-Hum-human?" they spoke with difficulty, tilting their head in confusion. Their broken words and hesitant attitude implied a severe lack of understanding for the language and speech of the villagers.

A villager, seemingly one of the more aggressive ones, raised their sword towards the figure, cautioning everyone else to do the same. "Sir! Look at that thing," they warned, "It looks like what they call 'Akuma' (devil). That thing should be dispatched. Its bright eyes stare at us like its going to kill us!" Their words were said with a tone of urgency, implying that everyone ought to follow their lead in order to protect themselves against the apparent danger before them.

The village leader was unhesitant in dismissing the first villager's worries, "You're crazy! If it was an Akuma, it would look like those scummy demon races from up north! How about we welcome it?"

The figure, who remained still and calm, turned to look squarely at the villagers, before slowly repeating their previous words with greater clarity, "...Aku-Akuma?" they said, using the name given to the demon races by the villager.

The Village leader sheathed his sword and smiled and pulled his hand out in a form of welcoming them, trying to get it to shake hands... The figure's eyes widen its chemistry in its brain thinks of what the human did as a sign of attacking.

They suddenly jumped towards the leader emitting a deadly aura of red crimson with their hands slicing the Village leader's arm off and then slicing his head off.

Picking up the decapitated head of the village leader, the figure seemed to absorb the human's knowledge via a finger. The other villagers, who had just witnessed the death of their leader, quickly drew their swords in a defensive, protective stance.

"Aku-ma?" the figure spoke slowly, their yellow eyes focused on the villagers, who quickly responded. "YOU'LL PAY FOR THIS YOU DEVIL!!" They screamed, charging forward towards the figure with the intent of exacting justice for their former leader's death.

Within seconds the figure jumped above the villagers and threw the head of their leader at them with power. One by one all the villagers that were in the vicinity of the grass field were picked off into decipated heads.

The figure, with their finger inserted into all the severed heads of their enemies, gained the knowledge that lay within the heads. As their consciousness returned, they slowly spoke with purpose in their voice. "Akuma... You call me Akuma, it is considered then. I'll be your devil ..." They had now accepted their given name and the fate that was bound to them. The manly voice was stern, yet young. The devil had finally awoken.

The figure, naked and finally in control of his fate, stretched his neck and body in freedom, before glancing at the severed heads and laughing maniacally at their dead bodies. With no one left standing to oppose him, Akuma soon began to walk away from the place where the dead villagers once stood.