Bellatrix Black; a true warrior born and bred, she had served out her time beneath the grindstone of two Wars, gotten her licks in and then gotten out as soon as possible. Not that her decision to leave battle was spurned by lack of courage, mind you, but rather her duty to Family came first and foremost. When Narcissa and Andromeda lost their husbands, she came back home to protect them both and ensure the safety of their Lines throughout the remainder of the Tumult. Bellatrix was a good woman, so long as you meant dependable and exacting to a fault, and Hermione could think of no one better suited to hire on as protection.