Powerful main leads in isekai

this is hilarious
she becomes the villainess, and tries to break her engagement with the tyrant king, but he likes it when she acts crazy.

use your chibi dragon form to get power! it's so obviously not just a lizard form, you come from a dragon family you idiot.

he became the other option in the love triangle of a story his sister talked to him about. in the book, the character sacrifices himself for the girl he loves, but this guy doesn't want to be involved in all of this mess!