OVA
Description
Lotte Birenkofen, princess and sole heir of the Grand Nation of Birenkofen, endured a childhood marked by distant parents. Her father prioritized politics and military matters, while her mother focused on social engagements, resulting in limited affection that triggered frequent tantrums. These emotional struggles worsened as family ties deteriorated.

Her life shifted upon meeting Eric Aretoze, a foreign prince held hostage in her kingdom. Their relationship provided emotional stability, reducing her outbursts and blossoming into mutual affection. They exchanged promises of future marriage. Despite numerous proposals from foreign princes drawn by her status and appearance, she rejected them all, honoring her vow to Eric. Concurrently, she dedicated herself to martial training. Appointed commander of the Knight Division at age twelve per tradition, her combat skills, honed by talented instructors and natural aptitude, earned her the feared moniker "Witch of Birenkofen" across the Land of the Six Shields.

Her trajectory shattered when Eric attacked and destroyed her kingdom. Captured by him, she faced imprisonment and an uncertain reunion. To prolong her life, Eric subjected her to training as a slave maid—a role combining sexual servitude with high-risk bodyguard duties for nobility. This process involved enduring degrading practices designed to transform her entire body, including loss of virginity and submission to psychologically and physically taxing conditioning. The training aimed to repurpose her battlefield capabilities into dual functions: providing sexual services while serving as a lethal protector willing to die for her master.

Her relationship with Eric evolved through betrayal and inner conflict. She contemplated killing him upon learning his role in her kingdom's fall, masking turmoil beneath apparent compliance. Ultimately, they reconciled and became co-rulers of the Kingdom of Aretoze, later founding the Six Shields Empire. Their union produced a son, Kunimi Birenkofen-Aretoze. Their story concluded when they sacrificed their lives to defeat Romanov I, ascending as Grandwalkers posthumously. Millennia later, their son would be discovered, renamed Hajime Hinobori.

Throughout her experiences, she maintained a fundamentally kind and charitable disposition beneath her warrior exterior, balancing battlefield ruthlessness with personal loyalty. Her combat effectiveness persisted through her transformation, enabling her transition from feared warrior to protector.