On the Correct Way to Raise Villains

What qualities should a good villain have - cold, ruthless, and unreasonable? Yan Wuyi looked at the little bun next to him Pulling up his sleeves: "One by one, one by one, Wo Xiangci eight-treasure gourd, grilled pig head, pipa prawns, chrysanthemum conch..." •••••• Taking off his clothes: "One by one, one by one, I want to hug this one when I take a nap." •••••• Feng Qing, the satiated little bun, occupied Yan Wuyi's arms with a satisfied look on his face and fell asleep peacefully, with suspicious liquid hanging from the corner of his mouth. Yan Wuyi held the little bun in his arms, and the corners of his mouth couldn't help but twitch. He was the domineering and treacherous villain that he promised, am I raising him crookedly? (╯‵□′)╯┻━┻