In the (web?) novel there was a standoff between Atou, the twins and the new guy, where she recognizes his outfit as a highschool uniform. Atou orders the twins to stop and return to Mynoghra as ordered by their king, and the twins simply refuse, saying that they want to go after the new guy for taking away their opportunity to avenge Isla. Seeing their outright insubordination, Atou explodes, yelling at them to remember their place and obey orders.
Meanwhile the new guy stands there awkwardly as he gradually understands that he wasn't saving anyone and that he just got in their way, causing the twins to become hostile. Atou questions the new guy about his intentions while being wary of a potential new enemy from another world, and eventually the new guy leaves.
Then the night fades away, and the twins snap out of their moon induced madness, becoming consumed by their grief. Atou then orders them again to return, telling them that she will pretend that that (their outright insubordination) didn't happen. The twins comply while feeling guilt for disobeying their own king's orders.