Will the protagonist also eventually be able to use all 3 types of haki? Or will you never be able to use them? I say this because most of Luffy's marches depend on haki and his fruit

What if you apply that of John Constantine and sell your soul to the most powerful demons? In such a way that no one can have it without having to go to war with each other.

I found this image where rimuru is wearing a uniform very similar to the one used in the "COTE" anime So I guess this would be his normal appearance in class.

The appearance of the protagonist usually

Aren't origami and tohka not supposed to get along at all? So why in this fight, instead of attacking each other, they only attacked the protagonist? If in theory in the origami anime she hates all the Spirits and Tohka herself is angry with them because they don't stop attacking her, at another point, no sans is supposed to be a monster that has 1 attack and 1 defense ? more than anything because he never sought to raise his stats? So in theory if the protagonist starts training physically he could improve his body to increase resistance or instead he could assassinate hitmen, murderers, rapists or any type of bad people to increase the "LOVE" level and in turn be able to improve your base statistics to do more damage, resist more hits and be able to attack for much longer without getting married

In my opinion, if Scott Pilgrim's world has magical elements, he could be one in theory capable of changing his appearance, the protagonist could try to change his appearance to one more in line with his personality and his powers and abilities, my suggestion would be to obtain the appearance or at least the abilities of John Constantine, a human specialized in mystical and demonic arts capable of making Lucifer himself owe him favors, preventing Hell from having his soul, and being immortal due to the war that could cause his death in all hell, a genius in manipulation and strategy etc etc, is that not only does he have powers similar to Matthew Patel, but even the way they both dress is similar

So Rias reincarnated an unconscious Issei? He wasn't even dead, just unconscious. He didn't ask him if he wanted to be reincarnated or not, did he directly reincarnate Issei into a demon without his consent? I know that in this fanfic, as in most, Issei will ignore and not care about being reincarnated as a demon without his own consent, But Ddraig himself is a fight-loving emperor dragon of domination and always seeks to be stronger, In this fanfic, couldn't Ddraig himself at least have the desire to retain his title of dragon emperor of domination? Instead of becoming just a simple breast-loving oppai dragon? It would be good if Ddraig had taken the opportunity to join the protagonist and leave Issei behind when he saw his attitude.

The protagonist: first, this is human territory so I have more right to be here, Second, this is not your territory, it belongs to Amaterasu and other gods, you only have the right to be here

Ptt: I wrote this with a translator, so some things may not be understood well

Además por lo que se dijo al momento de forjar su arma, está también tiene la función de absorber a los dioses o titanes para volverse más fuerte, por lo que aparte de matarlos tanto en cuerpo,alma y espíritu, les roba su escencia misma de poder, por lo que nos les queda ningún medio más por el que volver a la vida

His trident is a weapon forged from Poseidon's own soul, along with the minerals of the gods and infused with one of the primal forces, I think that is enough to know that his weapon not only eliminates the physical body, but also the spirit and soul of the target he attacks,

Will the protagonist have powers or abilities? Or his only role will be that of a background character who only tells the characters about the future and that's it.

Title unlocked: God Slayer (allows the user to give any being, even a god, a true death without reincarnation)

Gilgamesh has the power of clairvoyance, and his title of the golden rule, Where you will basically always be destined for wealth, So in theory while his classmates suffer point losses, not only would Gilgamesh not be left without points, but he would have even more points than all the other students.

Seiya? Is this fanfic about the knights of the zodiac?

Hades could in the future take the Underworld to live with Hephaestus, in theory he is one of the few gods who are not so bad, Another could be Hestia, and I think it would be all of them, the other gods are all the same

The personalities of some characters have been slightly modified, as well as the history of the order of the swallowed children, Poseidon should have been the last to be swallowed before Zeus freed them, not the second to be eaten

Does Rimuru have any abilities from his anime? How great sage, perhaps superhuman strength, high flexibility, Immunity to literally fire, ice, electricity, etc etc. ?

I didn't understand, rimuru Tempest is actually a reincarnate with his appearance? Because with being the "definitive analyzer" I imagine that at least he has the ability to be a "great sage"

Will the protagonist have a harem? Or is he just a guy who likes to give harems to others but stay single himself? Because from what I see the harems will go to Issei and Shirou