Kawaki is the series' deuteragonist who was intentionally ... However, Shibai also possessed the Rinne Sharingan as his third eye on his forehead, which none of the three karma wielders have.
While Kawaki was considered the deuteragonist of Boruto manga for a really long time, his actions at the end of the Naruto Next Generations manga have painted him into the role of a villain.
Undoubtedly, there were major developments being made in the plot, such as Boruto and Kawaki finally meeting properly after the timeskip, and at the same time, fans finding out what exactly ...