Recollection that Won't Come Back (戻らない追想) is a special short story given to those who purchased volume 11 of Sword Oratoria in Animate, Gamers, Toranoana or Melonbooks.
Summary[]
Before the Loki Familia's first incursion into Knossos Loki decided to speak with Filvis. She asked her about Dionysus to which Filvis replied that he had ordered her to help them. However, as a Goddess, Loki saw through her lie. Now that she knew she was acting on her own initiative she moved on to his next question.
Loki asked her if Dionysus was hiding something from them. Although taken by surprise the Elf soon composed herself and remained silent to prevent her from getting information out of her. The Goddess gave up and changed the subject, wanting to know why she cared so much about Lefiya. At that question Filvis declared that she wanted to protect her.
Their relationship had moved her to the point of disobeying her God, and her sincere words when she called her "beautiful" had changed her greatly. Filvis loved her as a friend and compatriot. Understanding those feelings, Loki allowed her to accompany her dependents. At the end of that, she also called her Lefiya's knight, making Filvis blush.
More than two months later, in the same place and just before the first assault to Knossos, Filvis found herself remembering that moment. After Finn announced the beginning of the operation, Filvis muttered to herself that she would protect only Lefiya as she ran by her side. With that resolution in her heart, she and her friend entered the labyrinth where their "destiny" awaited them.