Four Brothers Theater (四兄弟劇場) is a special short story given to those who purchased Episode Freya in Animate.
Summary[]
Alfrigg shared his thoughts with his brothers on how important it was for them to start to differentiate themselves. Although they prided themselves on being the strongest Pallums, people often grouped them together as it was difficult to tell them apart since they all looked and sounded alike.
After some initial confusion the rest agreed on how annoying this was. The brothers decided to do so by each ending their sentences differently and, since Freya's most recent obsession was a "rabbit", they opted to make their verbal tics rabbit-themed.
After each decided on their own, the four of them went over with Freya when Alfrigg saw her to speak to her with their new verbal tics. The Goddess however said that she couldn't understand what any of them were saying or tell who was who, and that it was also somewhat annoying, leaving the brothers saddened.