Board Thread:False Info and Speculative Discussion/@comment-26872127-20150809140147/@comment-5322646-20150810125300

^ Hey. Think the number on the wall was also the reverse 5.

https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcRAcspiFgbaYSs5HPttASY7nvQwhv_WU3KFEdbMEa4vqxl2zMzn6Q

For some reason I think it might have to do with the Kitsune Spirit's age. I believe Kitsunes get 1 tail every 100 years or so. Kira's been a Kitsune (seen as one) for about 8-12 months or so, I think, so the 115 could line up with age if you go off how she got her first tail recently.