Keigo headcanon: Preening is like playing woth his hair. When he’s stressed, it calms him right down when someone else helps him do it.
I love the idea of like --- idk --- I was sick real bad recently and just
laying in bed dead to the world because you’re really ill and Keigo being super stressed about your ailment. You’re his rock !!! You take care of him, usually, so when you’re down for the count he’s like a scared lil kid and he does his best to look after you but you can tell he’s paranoid for you
and it’s late at night and he’s given you your medicine. It’s dark, only the flickering light of the television in your little bedroom- and the soft noise from whatever commercial is breaking up your sitcom. And he’s at your bedside listening to your labored breath.
“I’ll be fine,” you say, and he lays his head on the edge of your bed. And you run your fingers through his hair, and he drapes a wing over you to keep you warm, and you run your fingers between the feathers and preen him to try and just - reassure him that you’re there and okay. And he hums and they get all puffy 🥺