I am afraid that after the prologue, only the (male and female) slime fights exist, for now. New content is added every week, but there is a lot still to be developed
She should be in the Graveyard after building the Slime nest. She is on one of the bug tiles, if you see no bug tiles you have already run into her and it might take a while to respawn. You can try sleeping to advance the time somewhat
