How do you live with a roommate who will get angry over small things and eagerly goes to roommates’ rooms to angrily question and confront them?

I was trying to sleep and my new female roommate started banging on my door loudly. Goodness gracious. Wtf. You would think the house was burning down. My other male roommate handled it well he was his usual relaxed self and didn’t placate her. I just got really nervous and scared and started acting a bit placating.

How do you live with a roommate who will get angry over small things and eagerly goes to roommates’ rooms to angrily question and confront them?
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