>>531342000
>D&D
No, they played Dragon Quest with Blue-Eyes White Dragon as the final boss. The simulation was based on Chloe's journal, Guillotine's chuuni friend who she failed to protect from a rampaging corrupted NIKKE. She originally wrote an isekai story with Guillotine as the main character.

Also, Chloe is Guillotine's "partner" before. Then the Commander eventually took that position years later.