In the novels of the Three Kingdoms, were there any plots where a member of the royal family with the surname Liu was the protagonist?

Answer 1

Yes, here are two recommendations:
"The Three Kingdoms: The Beginning of the Hu Peach Garden: The second son of Liu Yan, Liu Dan, traveled to the Three Kingdoms and became the protagonist of the novel.
"Three Kingdoms: My Han Clan's Clansmen Seize the Fate of the World": Liu He traveled through the Three Kingdoms and was one of the Han Clan's relatives. He also became one of the protagonists of the novel. I hope you like this fairy's recommendation. Muah ~😗