why do people think that CC is male?

I saw people saying that CC is probably male but now we learnt that Swiss and CT don't know that they are gonna play SHURB with nymphs. That's why they call CC in the chat he/him, they think that CC is satyr (and probably they think that AA and Ly'lac are satyrs too). Ly'lac was referring to CC by she/her because she knows that CC is her friend nymph.