Rye, Mina, and Dahlia went as a group, whereas Shadow went alone, the latter looking for Benjamin.
Shadow was the stealthiest of the four, so he was given the task to know where Benjamin was being kept and also free him if possible.
Though Alfred had told them where Benjamin was being kept, the number of guards stationed all around the castle and the dungeon was ten times as much because many vampires had come from outside. The population of the moonless kingdom wasn’t much, but that was only w