concept of mike and will's future daughter time travelling to the past but make it when she was only a few months old and she only stops crying when will and mike are holding her so they're put on babysitting duty and have to spend like a week just looking after this baby
them figuring out she can only calm down when mike tells her a story so him coming up with new stories of the paladin and cleric everyday pulling from their own childhoods and making will laugh which makes her laugh bc mike making will laugh reminds her of home
will tries to get her to sleep by singing her lullabies that joyce used to calm him down from his nightmares and mike just out of sight secretly listening in every time because will also used to sing that song to him to help him through his panic attacks
her only being able to sleep once both of them are holding her together bc in the future whenever will holds her mike always holds will at the same time until the party comes barging in one day just to find mike and will fast asleep holding their baby girl