Prince of Hannoven and Lycaonese to the bone. Klaus lost his deeply loved wife before they could have children, and never remarried. Instead he placed all his love on his niece Cordelia Hasenbach, whom he also made heir presumptive to Hannoven on top of her already being Prince of Rhenia. After Cordelia had lost both her parents at a very young age, Klaus served as her stand in regent for a year, before Cordelia came of age.  
One of the greatest military minds that Calernia has to offer, Klaus helped his niece Cordelia Hasenbach to become First Prince, ending the long Proceran Civil war over the title in the process.
Prince Klaus Papenheim of Hannoven is a grizzled old soldier with vivid blue eyes. 
During the fall of Hainaut Klaus lost an arm. Not that this stopped him still leading armies with a sword in hand. 
- ↑ Extra chapter: Crowned - Cordelia’s uncle, the Prince of Hannoven, had served as her regent for the last year before she came of age but he’d never presumed to contradict her in anything.
- ↑ Extra Chapter: Crowned - Uncle Klaus, a childless widower who’d flatly refused to remarry after the death of his deeply -loved wife, had always treated her more as a daughter than a niece. He’d gone as far as naming her his heir presumptive above any of the branch Papenheims, a decision that had caused some unrest when made official. Even now he was in Rhenia as often as Hannoven, the most trusted of all her councillors.
- ↑ Book 2 - Prologue
- ↑ Book 6 - Prologue