A female knight often a member of the Order or a Knight of a human kingdom that is corrupted by a Lilim's kiss or molestation. The molestation or kiss of the Demon Lord herself will also begin the process. Enraptured by a pink aura that turns black mixed with pink these women gain a gasous armor and weapon. They gain lots of lust and hunt among the men of their kingdom or the Order to seek out a 'squire' (husband). After finding their squire they use their new power to summon to them a Centaur Family mamono, an Elemental and a mamono of the Wolf Family. The Centaur mamono is summoned to them and desires to ride out until they meet their new mistress and serve as her steed in exchange for the sexual assitance the Black Knight's squire will give. The elemental is bonded to the weapon that the Black Knight uses to remove the obstacles that her squire chooses to put between him and her or obstacles that are placed between her and her squire by their enemies. And the Wolf mamano is summoned to them to keep track of the Black Knight's squire using their senses. After attaining her fellow monsters to keep her squire in his place, she'll go out and 'slay' (sexually subdue) a mamono of the dragon family to better protect her squire from the enemies that could seperate her from her squire. After the Dragon is secured the Black Knight will send word to the Lilim that turned her that she has fully protected the squire. The Lilim that turned the Black Knight will then arrive and enjoy in the pleasure the squire will provide her. Making her ultimately the sixth harem master and the princess that is often ended up with the knight in tales.
Sometimes a Black Knight is produced from the descendant of great female knight ancestors. And in the case will learn instintually upon corruption from a succubus how to fight and attain a squire.