Gefängnis (ゲフェングニス Gefengunisu) is one of the most powerful troops in the Althea Royal Guard, whose sole purpose was dedicated to punishing all evildoers by killing them. The commander of the troop was Jail Murdoch.
The troop quickly disbanded after Jail deserted the Althea Royal Guard. However, he spent a month reforming the group following Alexandrov Grigorovich's suggestion to use them to fight against the Special Service.
- Gefängnis means "jail" in German, which is a clear reference to Jail's own name.