User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-117.195.116.134-20150103164620/@comment-1359322-20150103171503

Not really sure if people are upset over Tosuka appearing but her being a spy is speculated. There's also speculation that she's dying and only appear to pass her Sacred Gear to Kiba. There's also her being a part of the main cast etc. Many speculations on her.