Tombofnazarick Stories

Ainz is the ruler of the Great Tomb of Nazarick and a successful one at that but after a few days things began to change around him. He freed an NPC that was never used, He found an NPC that someone else made and a return of an old friend. What is he to do? How will they react? I do not own Overlord nor any of the characters besides the one's I created of course.