I was inspired by @najikasunart and their short comic on Four with OCD. Therefore, I give you all Sky with scrupulosity, AKA Religious/Moral OCD.
I imagine his compulsive praying began during his adventure. At first, he did it to give himself strength and peace when he felt he fell short, but it slowly became something he had to do, or else he would fail and ruin everything. Now, he can't go one day without ruminating and praying at least 10 times until he feels that he and his companions are safe.
When the Chain find out about this, they do their best to help him out. They don't always know how, but they do what they can. Whether that be distracting him or even offering him a hug, they do what they can.










