Something I could do is join the wave village as a vassal state and be under the protection of Konoha because I don't think they want to annex their government until Naruto becomes the sixth hokage and technically conquers the land of Konoha. the waves and receive a part of the mission reward

Do you know if he joins a god, you could make him join Hestia since she is a goddess that goes with the theme of family and here in Argentina one of the best known things is the family that is loved and how numerous they are and their special ability could make the more members in the family and the more he wants to protect them, the more his attributes such as physical and mental will grow over time and the fight against human or non-human enemies

Do you know something that could fuse the element of wind and lightning and could create the element of storm and with that I could have a better positioned harem because I could create a new clan in the village of Konoha

If there is magic it could be very powerful if the protagonist can use it since if he uses the basic knowledge of science he could enhance it if he obtains elemental magic such as making the fire hotter by adding more oxygen or having almost infinite water by removing it from the atmosphere thanks to the particles that are hydrogen and oxygen

He will use graphene in his power armor that will increase its hardness and resistance against weapon attacks and enemy blows.

A good material that I could use would be graphene. It is a good material as hard as diamond and a good electrical conductor and energy storage. It would be good to use it and if it does not exist in the Marcel universe it would be good to discover it.

It would be good for him to learn the eight doors since it has a high healing factor, he could take advantage of it to make his body stronger by using that technique.

I'm curious about something and that is if it improves the body that you have possessed and that is that it could control growth hormones and make your body become stronger and more resistant thanks to improvements in your body.

then David in this universe will die from the virus that unexpected

out of curiosity it will only be a couple or harem

Do you know if you do the story of Naruto, the protagonist who is reincarnated would have more chakra than a common ninja, thanks to the yin chakra of his soul and he could make it one of Orochimaru's experiments, which would be the fusion of an Uchiha and Senju.

out of curiosity there will be a harem or a couple

You know, I'll be honest with you, I won't like Yang to be paired with Vegeta, give Bulma's sister the blonde, but not Yang, that could make me leave the story, and I'll be honest with you, I don't like Vegeta, and I want to see him suffer.

If there will be a harem since you can obtain DNA from other people's bloodlines, you could have a harem since the village would not have problems, thus having more stronger ninjas in the village

Aisha will then be born as his daughter and will not be his sister. It would be interesting to forget that now that she is stopped, she is already fertile and can get her women pregnant. It would be very good for the story.

Do you know something that the protagonist could do is give himself improvements to his body such as increasing the strength of his muscles and bones by controlling hormones and coating his bones with nano carbon something like the Spartans from Halo

Now that I realize I could have more chakra since the spiritual reminiscence could grow it more and not only that I could obtain more bloodlines in the future and with that I could gain more power and also obtain the elemental affinities making it more natural

You know, the protagonist could have a harem since if he can copy his Uchiha blood lineage and so on in his genetics, he could create a new clan and obtain more powerful nymphs in his line for the future.

You know, it would be interesting if women get pregnant, it could be that the pregnancy lasts less than a human and they have it in about 3 months instead of the 9 months of a human pregnancy, thus creating a clan of hollow wolves and conquering the hollow world.

Do you know instead of Guru dying he could fuse with Nail to make a super Namekian and make the Namekians have a better defender for future battles