IIN transgender(?) coworker using female bathroom

I think this makes sense. Personally I just go off how someone presents. Even if the person is very obviously male, if they're wearing female clothes and have girly hair etc then I wouldn't say a word about them using the female bathroom because they obviously are trying their best to live as a woman, even if it isn't working too well. That's their own business and of no threat to me. If they don't look particularly feminine and are still trying then life is probably really tough for them already, and they don't need a earful everytime they try and use the toilet.

If it's someone who is very clearly a man and is dressed like a man, and has made no attempt to look like a woman, and they followed my little girl into the female toilets, then I'd have a huge problem with that and would actually tell them to get out, and if they didn't I would make a complaint to management and quite possibly contact the police. In this scenario I would assume that person to be a sexual predator.