Transness is the concept of being transgender, identifying as a gender other than the one you were assigned at birth. It's the opposite to cisness, which is the act of being cisgender (the opposite of transgender).

This is a concept utilised often by members of GAYER, as pretty much all members are trans or non-cis in some way. Most GAYER members will often talk about Eris herself being a trans woman, as they seek to have an Eris who reflects themselves.