Board Thread:Questions and Answers/@comment-25032153-20140909030158/@comment-5693502-20150809181252

Her knowing Baam can all be explained by her relationship with Rachel. Remember that Yura explained that she was contacted by Rachel, via Emile, where she was told she could find something important on the Hell Train. Rachel also told her about Baam, which is why Yura recognised him.

I mean, we haven't seen Yura's full power yet (she's a Light Bearer and yet we've never seen her use a traditional Lighthouse yet), so she has relevance in that we still don't know what she's gonna get at the end of all this.

As for saving the world with her suitcase, lol, it's a specialised Lighthouse that's just above C-rank, it won't do much if she gets higher up the Tower.