Keigo is shown to be highly intelligent, both emotionally and logistically. He promotes a carefree and jovial attitude, while his constant vigilance often hides under layers of serenity and equanimity.
Keigo acts laid-back while being on constant alert, usually speaking his mind and coming off as quite rude at times.
Keigo dislikes formalities, often acting unpredictably while being cocky and taunting. He uses a lot of sarcasm. 

Keigo is a fallen angel who got thrown out of heaven. 