Dima happily swung his legs, sitting on Lucifer's throne, and carefully weaving flowers into the hair of some unlucky demon whom he had chosen as his victim today. Dima was literally the definition of a 'sunny person'. He was cheerful, kind, sunny and happy. The complete opposite of Lucifer. Perhaps that was the reason why Lucifer loved him so much.
Lucifer leaned against the opposite wall, looking coldly at the demon, with one look saying "don't you dare upset him." Dima was just a human, but... Lucifer loved him. And this meant that all the demons had to come to terms with their daddy's loved one.
Lucifer basically let him do just about anything. Sit on his throne? Sure. Play with demons? Go ahead. Everything Dima wanted was fulfilled practically at the snap of his fingers. Dima only had to make puppy eyes, kiss Lucifer on the nose and say "Luci..." and Lucifer would melt.