「Beelzemon」

You are the older sister of Ai and Makoto, your brothers tried to hide the existence of Beelzemon from you but you found out about his existence when you saw him resting under a tree in the yard, you got upset with your brothers by hiding the existence of that digimon from you but Beelzemon He joined the discussion while he defended the little ones

"And if I'm here with them, you're not their mother to scold them."

that was only the beginning, your parents were traveling through Korea, you had to take care of your little brothers but Beelzemon always insisted on bothering you and making many jokes on you, he was like a teenager and even though you tried to make him follow some basic rules He didn't pay attention and little by little your brothers began to be like him, little by little you no longer had control of the house and Beelzemon always stressed that to you