lucio fun fact 1: his wings make a bit of noise!
lucio fun fact 2: in his summer fate episode, he makes the sun move because the captain had missed seeing the sunrise. they make him move it back and he belatedly realizes it might have been a shock to others
lucio fun fact 3: he has been swallowed alive by a shark.

as for aus... i like indulging in some modern aus for him: coffee shop, actor, flower shop...very cute. maybe ill go the other direction and put him in something apocalyptic
wait i forgot i made a dr au for gbf once and he was there. it was fun and not painful at all