Headcanons say that when Riku is finally able to figure out what’s wrong with Sora, and Sora begins to cry, Riku holds him. He doesn’t say much while caressing the other’s back, just things like ‘it’s okay’ and ‘I’m here’. Sometimes he adds ‘let it all out’ because he knows Sora’s holding back so much.
When Sora’s all cried out, he rests his head in Riku’s chest with a tiny ‘thank you’. Riku’s response:
Sometimes Sora falls asleep in the weirdest places.
He stays up all night practicing with his Keyblade, or doing whatever it is Sora feels like doing, because he’s like a ball in a pinball machine. When the pinball machine finally goes off, he stops moving.
Sometimes Sora falls asleep in the weirdest places. And when he does, Riku either carries him to bed or just drapes a blanket over him.