1x8 - Katana Maidens: Toji no Miko

Akane explains to Kanami and her friends that twenty years ago, a massive aradama named Princess Tagitsu attacked Sagami Bay, causing great destruction. A number of Toji led by Yukari were sent to battle it. Included in the force were Kanami and Hiyori's mothers: Minato and Kagari, respectively.