Cat uses xe/xem/xyr pronouns.

Here are some example sentences using my xe/xem/xyr pronouns:

Xe went grocery shopping.

I went with xem.

Xe brought xyr reusable bags.

At least, I assume the bags are xyrs.

Xe packed the bags xemself.

They/them/their pronouns are also acceptable to use for Cat.

Here are some example sentences using they/them/their pronouns:

They went grocery shopping.

I went with them.

They brought their reusable bags.

At least, I assume the bags are theirs.

They packed the bags themself.