Might I ask how you knew since you met her that she is the type of person who is too sensitive and unable to accept critics well? Did someone tell you that or did she tell you that? Is it possible that by your thinking that about her, you have treated her in a manner to draw out emotional outbursts?

I used to have to interact with a man who would savagely snarl filthy language. He said the meanest, scariest, most filthy things to me when I tried to draw his attention to a fire hazard. It was my responsibility to tell him that. And that was how he treated me. Would you say he was the type of person who is too sensitive and unable to accept critics well? Weeks later when he shouted at my boss using the same filthy nasty hateful and threatening language over another work-related situation, my boss was shocked and horrified. He didn't like being addressed in that manner, and when he told this man that, the man raised his voice even more and swore some more; continued swearing until my boss left the room.

I think you have the right idea to contact HR. You can tell them that you find certain types of coworkers hard to deal with, and describe what you say and do that puts you in those situations. But I wouldn't contact HR after work hours--work difficulties should be solved during work hours. I hope this helps.