Board Thread:False Info and Speculative Discussion/@comment-2020973-20150108174915/@comment-86.97.187.108-20150325121253

Okay, first of all noshiko is close to 900 years. In other words she must have a ton of knowledge (including about kitsunes).

Basically Kira used the piece of obsidian to help unlock her healing ability. Her parents knew it was a tail because she brought it back to beacon hills from mexico and she didnt know why. They didn't 'make' her tail. Her dad just carved it to look like a shuriken.