Jay

I had a hard time looking for it as there are so many. Basically main character is a child (little girl) who was abused, they reincarnated and decided to live a simple life away from people. They made there home in a cave and made it nicely. They then saved someone who ended up being a noble and was taken to a town. People have kindly found one similar about a brown haired boy but thats not the one I am looking for. (They may have also loved slime but its been a long time and I dont remeber) Please let me know!!!

ok so it starts with this girls father rebelling or something, she begs for his life from the emporer person there. He throws her into a pit, she gets a ghost mentor and becomes strong, she also has a majic ring that makes her look like a boy or something like that. She comes back from the pitt and becomes the emporers guard. She goes on quests, falls in love with the emporer and sleep with him in her female form without telling him who she is. One of the guard quests involved her defeating some dude who had kidnapped a merperson and cursed stuff until the bad dude was like infected with pearls coming out. It is a fantasy martial arts thing. PLEASE I CANT REMEMBER ITTT. The girl has blue/green hair repending