How to make Warden not-hostile to my custom mob (2025.2)

Version 2025.2 (1.21.4 Neoforge)

Hello, I would like to make a mob that acts as an ally to the Warden? I am working on a mob that is like a much weaker version of the Warden, sort of like it's minion, and I would like to know how can I make the Warden non-hostile towards my custom mob. I already posted a topic similar to this, but disappointingly, I had no answers. 

(I also asked from the previous thread on how to make my custom mob hostile to everything except it's own kind, but don't worry about that, I know how to do it and I only mentioned it in case someone was going to bring that part up.)

As I said, help would be very appreciated.