So a thought occured to me and it's why I can't have nice things. In my SU AU,Kara shatters and puts Boruto back together to make a "Reformed Gem" and it causes him to become a cracked husk of his former self. Like White Pearl,but without the color loss or voice change.
Mitsuki saves him and decides to take care of him until he's mental stable enough to go back home. Trying to bring memories back and do small things like help him sleep when he has nightmares,and sleeping is very important to Boruto's recovery.
In my AU,however,Gems are still Gems,but they function like humans too. Meaning they age,need to eat,need to sleep,can reproduce,ect. But there's only two ways for a Gem to die. Age or shattering.