a child, typically a badly behaved one.
synonyms:badly behaved child, spoiled child
You forgot “prone to monologuing in front of people who could screw up his plans.”
“You sly dog! You got me monologuing!”
Aha, he’s been manipulating his clan so he will get not only his own clan but also control over all of Japan, and other will take the blame for the atrocities it will involve…