Combining two large systems in one project usually means writing the glue code between them yourself. Emerald Integration for Animal Controller sits in the Tools and Integration category and supplies that link, so creature behaviour from one system and character control from the other can coexist without custom bridging work.
The asset is an integration layer between Emerald AI and Animal Controller, and it depends on both of them being part of the project. It works with the Built-in Render Pipeline, URP and HDRP, so it fits whichever pipeline your creatures already run on. Among unity tools, an integration like this suits teams who have already committed to both systems and want them to cooperate.
Download Emerald Integration for Animal Controller from Ultimate Game Assets and add this Unity Integration Tool to your creature project.