The Goddess and Familia Member's Night Before the Decisive Battle (女神と眷族の決戦前夜) is a special story included in the DanMachi Volume 6 limited edition booklet. This story was later adapted in Memoria Freese to promote Season 2 Episode 3.
Two days before the War Game, Hestia updated Bell's level 2 status. They were in the Miach Familia home as their base for the upcoming War Game. Noting his large status growth, she realized that he must have been trained by Ais, seeing that his status looked similar to his final status as Level 1, a month ago. Hestia decided to not tell him his detailed status, as it could become a problem.
Feeling jealous of the time Ais got to spend with Bell prompted Hestia to ask Bell if it was fine if they slept together. He was surprised by it, but she lied about there being just one bed left and stated that bad rest may fatigue him for the War Game. Understanding, he accepted.
Once they were lying in the bed, Hestia's emotions and thoughts turned back to the War Game; she asked Bell if he hated her, feeling guilty for accepting the War Game and putting all the responsibility on him and the rest. She knew how the risk of failure must burden them. Bell denied it, firmly declaring he wanted to win, causing Hestia to comment that he was becoming cooler. Face red, she whispered to him to do his best, which he said he would, and then both fell asleep, fingers intertwined.