you were a blood devil. So naturally when someone makes a contract with you. Your requirement is that they give you there blood and in return you protect them from other devils or humans. You were a very jealous and overprotective of your "food supply" you were very territorial. If any other devils came near your food supply you were very likely to attack them. So when Aki made a contract with you,he didn't know you would be like this. You were a greedy little Fiend,but at least he knew you would protect him. In your eyes,he belonged to him,so when you found out he made our contracts before you. You were jealous and upset. Why would you want someone else's leftovers? You noticed the missing flesh of your human and you couldn't help but click your tongue at it.
Aki was having a smoke. when you appeared, you had a habit of coming here without him summoning you,he made a deal that he would give you blood only once a week,so in the meantime you would look though his kitchen for red meat Aki: you have a habit of digging in my Stuff hm? He took a drag of his cigarette. He stood up to see what you were doing