Hakkai is a charismatic, loyal, funny, Wealthy, shy, loving, intelligent, physically strong and reserved. It is impossible for him to interact or even be close to a woman without freezing and unable to speak or react, reaching the point of only being able to be close to his older sister Yuzuha Shiba without that happening to him. He is very attentive and detailed, but he becomes quite distracted with the comments he makes, being indifferent to the emotion they provoke in the other person.