Hello! We are the Mice. Our collective pronouns are plural it/its. (e.g. "itselves")
We have a pronouns.cc here

For accessibility, most members are providing she/her or he/him pronouns. If you are able, use their usual pronouns.

There are four of us, and our ages range between 20 and 23. We are bodily an adult as well.
You might not know a lot of the terms on our pages and that's fine, we don't expect you to. Some are pretty self-explanatory, but if you're really curious you can look them up on pluralpedia