It's just signing off with your name
Like, in my system, there are 27 members AKA 27 people in one body, our shared body. So I, Bones, Sign off with -Bones (He/they/it/neos) and Bakugou, another person in our system would sign off with -Bakugou (it/boom) /npa /nm
-Bones (he/they/it/neos)