What should I do now?
P/s: I'm asking this for my friend, she has been banned from using Upwork Community so she can't post questions here. Thanks for assistance!
You don't have to do anything.
A client can not harass a freelancer unless the freelancer allows it.
Don't allow it.
Feel free to not work for this client.
Feel free to block the client in all communication channels.
This may not be a weird client or inappropriate client at all. This may simply be a bad fit. Not every client and freelancer are meant to work together.
This may be a client that some freelancers think is awesome to work with. Let them do so.