Rias Pov:
Opening the pipe, I saw the silhouette of a man. He looked familiar.
"Oh my Lucifer!" I exclaimed out loud.
It was Hajime, he was in a class of mine and he is pretty kind. We bonded over our love for manga. His condition immediately struck me. His body looked rough, he was missing an arm and he hand blood all over. He had some darkish black liquid near his mouth. There was a scar on his right eye and his body looked like it was breaking down. I knew what this was from. It had to have the consumption of a demonic beast.
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Demonic Beasts:
Once, gods adorable and loved beasts blessed in his garden, only to be corrupted by devils and fallen angels when casted out of heaven. When devils were cast out, they brought a large amount of god's creations with them. They slowly turned them into their own by injecting demonic energy over time. This caused the potency of the demonic energy to increase leaps bound and the color to change to a deep crimson.This caused them to become mostly mindless creatures with an occasional outlier. Devil's thought of them as a potential livestock. However, the potency of the energy would cause anyone's body to break apart. Eventually turning their body into mush and guts.
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Rias Pov:
I was indebted to him. He kept my secret about my hobbies. He could've tried to blackmail me but he didn't. I found him interesting, after all we were in a school full of perverts. This was the first time I realized my actions have consequences. I pulled out of thought by my peerage.
"What the hell!" Issei said with surprise. This was the first time he's ever been in action and had to experience this.
Koneko was frightened, it reminded her of the incident which led to her as a peerage member.
Kiba looked down, although he has killed before he never purposely made them suffer. Hajime looked like he was just hit but a large explosion then splashed by acid.
Akeno looked shocked, she would never imagine a friend she liked to tease would end up like this. This was about the most gruesome scene she had ever seen. Sure she was a sadist, but this was to a new level.
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I had to revive him, if I payed more attention to territory than this wouldn't have happened. His will to survive also helped make up my mind. If he wanted to leave my peerage in the future I would let him. This might be have been me trying to make up for my past mistakes but it was now or never. With that I injected my rook piece.
Everyone looked on with amazement. His body was being put back together. The pieces on the ground coming back together like someone rewound time on them. Slowly his body came together, he changed though. His previous scrawny look from before was gone, instead it was replaced with an entirely new build. He had a defined build. A swimmers body with proportionate muscles all around. However his arm didn't come back. Instead it was replaced with a stub. His hair dark brown hair had become a pure white, surprisingly it was the same length. Another surprising thing were his eyes, they changed from light brown to a dark crimson.
"What should we do about this?" I asked my peerage. No one could come up with an idea.
"We could hypnotize the people he knows into thinking he was born without an arm, and say he entered his chuunibyo phase for his hair and eyes," said Issei.
"That's the first good idea you've ever had," said Koneko causing Issei to become downcast.
"I'll have Sona look through his school records and teleport him home," I said calming everyone down. Koneko holstered his body over her shoulder and we prepared to teleport back. Once we got back to the club room, I sent a message to the Archduke saying we exterminated the devil. Afterward I met with Sona, at first she thought I was lying and that it was some sort of sick prank, however she was proven wrong. When I showed her his body laying down on a couch in my club room she was confused and thought I hired someone. She quickly changed her mind once she saw his ravaged uniform. She gave me the records and I was able to find his house. I teleported to his house and found his room. I changed his clothes into some pajamas I found in his drawers using magic.
I left his home following that but the next step would be tricky. I had to contact my brother and ask him for help with this. He agreed and gathered a team of some of the best users of hypnosis. They were able to make a field that would make everyone think he was a chuunibyo and born without an arm. I thanked my brother and went to my apartment to sleep. This was a long and troublesome day.
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Hajime Pov:
*Ring ~ *Ding
I was awakened by the sound of my alarm clock going off. I tried to stop the annoying ringing from the clock but my arm didn't hit it. Was last actually real? Didn't I die? I looked over at my at my left arm only to find it replaced with a stub. I fell out of bed from the shock and happened to land in front of my mirror.
"What.. the.. fuck!" was all I could've said.
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Feedback is wholeheartedly welcomed and will help improve the quality.
I have reached on conclusion, I don't plan to give him a sacred gear. The magic of arifureta I believe can be replicated using devils magic. Devils magic is fueled by imagination and you can do what you want with it as long as you have enough mana and magic power. Also, I believe a close range sacred gear like a sword would defeat his character. I plan to still give him lightning powers but you will see how. Thank you for the suggestions though everyone.
One more thing, devils in Dxd have one deadly sin which they heavily embody, I am planning to make his main sin gluttony with wrath as his second.