Damage that is done by somebody who is angry can leave marks on a relationship much like scars.

The Three Checks
Did I do Something Wrong?
Am I Putting the Relationship in Danger by having this Conversation Now?
Is There Something I Can Do to Help This Person?

Helping Someone Who is Angry
Apply the Stop, Drop, and Roll Method Identify what the root cause of their anger is. Help them find a way to address the root cause of their anger with whomever they need to address their anger.