Diaval

As with Diablo, Diaval shared the latter's loyalty towards Maleficent as her confidante and assistant where in his case, out of gratitude for saving his life from a human farmer. Other than that, it is clear Diaval lacked the former's malice owing to his kinder and considerate personality. His relationship with Maleficent started off a rocky one because of his mistress' bitterness from Stefan's betrayal and clearly saddened upon seeing what she had become. Nevertheless, he continued to serve Maleficent faithfully, and was visibly relieved to see his mistress regained the peace she lost thanks to Aurora.

In human form, Diaval appears as a lean, and a clean cut individual. With a relatively average stature for a human male, Diaval is slightly taller than Maleficent. Whilst his frame is rather small, Diaval's chest and face have markings that are reminiscent of feathers. In his other animal forms, there is always something birdlike in his features, whether it be a feathers, talons, or a beak. Diaval himself has black slicked back hair, very dark brown eyes, and a fair complexion. Throughout most of the film, Diaval always wears black clothing with an open shirt, a belt, and a matching coat. At the end of the film, however, he can also be seen holding Maleficent's staff and wearing a coat designed with sharp animal skin.

Shapeshifting: Diaval can transform into any animal, however, it is dependent on Maleficent. Diaval has transformed into a human, a wolf, a horse, a dragon, and a bear. However, he only ever transforms at Maleficent's will. She generally keeps him in his human form, as she prefers him to be able to converse with him, as well as offer assistance due to her disability.

Maleficent and Diaval

After saving his life, Diaval promises Maleficent he will be her humble servant as a gratitude. Maleficent and Diaval have been together for twenty-one years now. Throughout the years they've become close friends and even after by this time, Diaval has payed his life-debt and Maleficent no longer need "wings."

The book "Heart of the Moors" by Holly Black states that despite this, there's not another place where he would prefer to be instead of the little dysfunctional family that Maleficent and him formed with Aurora.

On the other hand, Maleficent is not oblivious to this peculiar relationship and even treasures it.