I work with one woman who is a manic depressive and one day she will bend over backward for you and the next day she will stab you in the back. I am always on edge around her and absolutely do not trust her. She has also said that she will claim discrimination due to her mental illness. I don't think I should quit since pretty much everywhere you go there will be difficult coworkers, but on the other hand I would like to learn how to not let her annoy me and have a more peaceful work environment.
Confrontation entails an assertive venting of anger when it is justified.
Professional civility is a path of too busy to bother . Amicable reconciliation expresses empathy for how this I can't stand individual might feel during her periods of stress and depression. Avoidance is a matter of keeping your distance from her. Is there not a way for your superior to arrange a session or two with this individual and possibly several of you who have had the numerous problems with this person. In such a session these complaints might be presented and a list of desired behaviors specified.