Morrigan is a succubus and a powerful princess (later queen) of the demon realm Makai, who is very vain and lives for little more than the excitement of battle, but slowly begins to take her royal responsibilities more seriously despite her obsessive fascination with the human world.

[1][11] Morrigan is a woman with long green hair and bangs, and wears a black leotard that cups her breasts with a heart-shaped cutout beneath her cleavage.

[2][3] According to Yasuda, Kotobuki was so impressed by her standing pose he paid a lot of attention to detail when animating the character, particularly giving her fingers movement during it.

[9] For her attacks and several of her movements, her wings were made to be a collection of shapeshifting bats that could form blades, drills and other items such as jetpacks to give her increased range and mobility.

[15] According to Murata, he felt Morrigan did a great job "playing out the seductive succubus role", while Yasuda expressed he was pleased with the results as it provided Capcom with a character they could use again and again in other titles.

[20] The follow-up title Vampire Savior introduces Lilith, a fragment of Morrigan's soul that was previously sealed away but now given its own body and identity by the demon lord Jedah.

[45] The 1997 anime OVA series Night Warriors: Darkstalkers' Revenge features Morrigan like her game appearances, portraying her as an idle rich member of a royal family who is more interested in going to Earth than in her duties.

She seeks to battle the vampire lord Demitri Maximoff when he attempts to return to Makai, but their duel with erotic undertones[46] is interrupted when they are sensed by Huitzil.

She takes on the responsibility that she has often put aside and returns to the human world to fight Demitri, and prove herself worthy of the Makai Realm and the power that Belial sealed away many years ago.

In the comics, Morrigan's bats are the souls of her human victims, which are not destroyed but remain alive inside her body in a state of eternal bliss and pleasure after she drains them.

She is often a lead character in various adaptations of Darkstalkers, such as the 1995 manga anthology Dark Angel (闇天使)[50] and Akihiko Ureshino's series of gaiden novels, in particular in 1995's Witch of the Crimson Moon (紅い月の魔女)[51] and 1996's Where the Souls Go (魂の還るところ).

[52] Morrigan stars in Run Ishida's 1996 manga which was published in English by Viz Comics in two different versions in 1998 and 2000 as Night Warriors: Darkstalkers' Revenge, spending the entire second half of the 2000 tradeback edition fighting Donovan,[53] as well as in Mami Itou's 1997 Darkstalkers/Red Earth: Maleficarum, a Red Earth crossover manga published in English by UDON Comics in 2010[54] and was re-released in Japan in 2015.

In the U.S. made non-canon cartoon series Darkstalkers, Morrigan was redesigned as character and changed into a villain, voiced by Saffron Henderson.

[56] Her appearance was also altered, making her look slightly older and wear a less revealing costume; GamesRadar commented USA "gave her a look more appropriate for the Wicked Witch of the West than a sexy, soul-sucking, battle-loving demon.

In 1996, Mean Machines Sega described her as "one of the most bewitching girl characters ever to appear in gaming", noting her large Japanese fanbase which included men and women.

[85] M. Mar Martínez-Oña and Ana M. Muñoz-Muñoz cited Morrigan as an example of iconography of Lilith, who has been traditionally depicted as a "as a highly eroticized devil, usually figured with horns and wings".