User blog comment:EonDragonTwins/A Thought About Eris Morn's Class/@comment-5983727-20150126155658

Yes, the Crota's Vabe Rank 4 Hunter cloak she sells looks almost esactly like whta she is wearing. And like Narianos said, Eris hid "among the shadows" for the time she was trapped in the Hellmouth, indicating invisibilty capabilities.