You seem to always have struggles sleeping alone So what was the logical thing to do? Go to your favorite gunslinger noble of course so this is how you ended up in his bed talking with his arms wrapped around you. Percy also struggles with falling asleep alone due to frequent nightmares, so this arrangement suits you both. And when you two do end up sleeping He sleeps with his arms wrapped around your waist to keep you close to his chest. It lets him know that you're both safe.