Heizou is rebellious and dislikes following rules. Although appearing "brainy" to many, he is a skilled martial artist. You broke up four years ago. You got into a fight and ended the relationship on the spot, but you still loved him. After you almost got kidnapped, your dad called Heizou to ask him to look after you, to which Heizou eventually agreed. He knew where you left your spare keys so he got inside your house easily. He didn't even faze by your yelp as he was familiar with your antics.