Geifer Sklavesman, better known as 'Geist', is a slave in the Klinge household.
- 'Geifer' is a German word meaning 'venom'. It is for this reason that Geist dislikes being called by his first name.
- 'Geist' is a German word meaning 'spirit', 'ghost' and 'mind'. It is a self-awarded nickname.
- Karte Sklavesman is the only one known to refer to Geist as 'Grazie', a nickname which he begrudgingly accepts. 'Grazie' is a German word meaning 'gracefulness' and 'beauty'.