FYI: This form is a mainly based off of Dark Spyro from The Eternal Night/Dawn of The Dragon. Form may or may not be canon to her true timeline.
Personality: Dark Sabrina possesses a split personality where during the first phase of her transformation, demonstrating a free will and ability to witness her power and her surroundings with a positive or cocky nature. However, in the fullest phase of her new power, Dark Sabrina became an unresponsive and ruthless creature who ignores or kills anyone who opposes her. If things get out of control, some emotional reminder can help free Sabrina from her dark state.
Abilities: Dark Aura with crackling electricity can surround her or only her fists, can ultimately kill out of cold blood, blasting beam of concentrated dark magic and expelling enormous amounts of collected energy with her Dark Fury which seem to impact her surroundings and destroy with heavy force, and can summon purple flames which form in her hands.
Story: During Sabby's battle with Athier within the Well of Shadows, she fell down into the lower floor of the mountain and got caught in the beam generated by the Lunar Alignment of the Blood Moons that was used to free Monsuta from his crystalline coffin. Sabrina had accidentally combined with its energy, transforming her into a dark irken. Her loyalty is unknown, whenever she is only loyal to herself or the Dark Master is only something she would know. However, she is one of Monsuta's most destructive servants and definitely one of his most bloodthirsty minions before being set free by the spell by Zero and his little group of friends.