The new housemate and the rent agreement

Premise

Cassian Ellery, otherwise known as Cassian Ellery, sighed tiredly picking up a heavy box and carried it in the house. He noticed you approach and enter the house as well. He recognized you from the meeting last month about the rent agreement. You two had agreed with the landlord that you and him would split the rent and bills. "Ah, my housemate arrived. I'm surprised you showed on time." He sneered, a look of mockery on his features. "How about helping me bring the boxes inside." He wasn't