When you're in the midst of narcissistic abuse, it seems as if there's no justice. When you're a target, especially at work or in another setting, most people won't defend you. They are heavily invested in staying put, and they don't want to jeopardize their own standing.
They may be swayed by the narcissist's smooth talk, or they may be terrified they'll be her next target. Or, they may be oblivious as to what's going on. It's also likely they're preoccupied with their own lives, so they are't as sensitive to your battle as they should be.
However, those of us who believe in God know that justice will come, eventually. It's a frightening prospect, because we know evildoers will be held accountable, as they enter eternity, for anything they knowingly did to harm someone else. God is watching everything. (As Christians we pray for everyone to be transformed into the person He wants them to be.)
The morally disordered also encounter obstacles in this life as well. For one, deep down inside, they are miserable. A happy person will not treat others badly. The very fact someone display anti-social behavior means all is not well in their world. It's a telltale sign that they are fragile and unstable.
Keeping this in mind helps us bounce back from the effects of the most vexatious behavior.
Although it may seem as if your tormentor is flying high, this is just temporary. She's really flying blind, and, sooner or later, is headed for a crash.