My take on it is that it basically doesn't matter whether Lia is gay or not. She was never realistically ever going to be available for anyone here because she's been very open about being into 2D men first. I think she's just the woman equivalent of "prison gay". Keep in mind this is a list of what people would consider "lesbian" nowadays.
https://docs.google.com/document/d/14MiPVvdXl2ICg41aFHcfUktxX4DO-058ZXg6v6W_Jg0/ 