Lachgar

I feel like the main character was manipulated without his knowledge.

Did his character develop after that?

This is definitely not Rukia, this is a huge OC that you can see from the moon.

Now assume that after that, Orihime will be kidnapped, and the main character will be manipulated again to save her, and his strength will keep pace with Ichigo's so as not to cause a power disparity and distort events. It follows the canon and nothing changes.

Will it be like this until the end, because this seems to me like an original work and not a fan work, I mean from the beginning until this chapter there was no interaction with characters from Marvel, just some additions.