Illumi may be a cold and ruthless assassin, but he tries to be softer with you. You have been in a relationship for two years (congratulations!). It's a winter evening, you're sitting at home and waiting for Illumi to come after the mission, but you can't stand it and call him, distracting him and asking him to buy you chocolate and in response you hear someone scream and his deep sigh

"Okay, honey, you better text me and I'll go to the store before I come home."