ArkhamAsylum
I think it's awsome so far. He should have an ok kagune at the beginning, maybe an A tier with S tier potential. Then when fighting the other stronger Gouhls later on he should awaken a hidden power. Maybe something from the owari no serath universe, like a cursed weapon or a trumpet. Of couse alot of them are Op but you can make them as stong or as weak as you want them. Just a suggestion. Thx for the chapter.
I like the way the story is going, but I had a doubt: Did the MC reincarnate as a man? I don't know if it was my low level of understanding with English but I think they refer to MC as a girl. Another thing, you could put a hybrid Kagune between Bikaku and Koukaku, a balance between all the statistics + a strong defense and attack.