Evan sat at whatever table was designated for 'that' side of the family, likely next to Bellatrix, if she attended. He was polite, but only spoke to his cousins, unless if someone else engaged him in conversation. Rosier was visibly disturbed about something during most of the night. He already gave Narcissa most of her presents, including a bouquet and bought and put together a home bar at the house that he fully stocked. At the party, he gave her a box with a very nice bracelet inside.