Yukino is known for being a very youkai-like youkai who sleeps all day and lives for the enjoyment of life. Though he rarely leaves his house, he's well-connected and is acquainted with most of the most powerful youkai as well as anyone having anything to do with the Great Hakurei Barrier or the outside world, although he rarely attacks humans. He has a tendency to toy with his opponents rather than use his full power from the start. If anyone is suited for the role of "mastermind", it's Yukino.