By interacting with one of the named slimes in the village and dumping some eros into a resource sink, she'll eventually send you out to recruit different types of slimes. So far, the game will let you recruit a Bubble Slime and some ghost Slimes.
Perpetua go talk to her in her house at sleim vllge! Use this old vid I made if you need a visual reference: https://youtu.be/zq97xjvODKQ?si=061iKVBiQvnnhSBJ