Board Thread:General Discussion/@comment-1446360-20180415071724/@comment-27144409-20180510204747

Ruby is the only known individual with Silver Eyes, which are inherently harmful to Grimm, and Salem might well gun for Raven and her worthless tribe down the road.

Even if Raven hates Ruby, she has value as a living weapon despite that perspective, and the trigger for said powers is emotional pain, so bonus if you hate both her and Salem.