Morinth

Morinth is an Ardat-Yakshi, an asari suffering from a rare genetic disorder which causes her to kill her mates while joining minds with them. In turn she becomes smarter, more powerful, and deadlier after each coupling. She has spent centuries as a fugitive from asari justice, surviving by her wits and cunning. Her powerful biotic abilities, and talent for dominating the minds of others, have kept her alive despite the odds.

Weapon proficiencies

 * Submachine Guns
 * Assault Rifles

Powers
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Loyalty
Morinth does not have any specific mission to gain her loyalty. Rather, Shepard earns Morinth's loyalty when Shepard chooses to assist her in the duel between her and her mother during Samara's loyalty mission.

Romance
If Shepard talks to Morinth on the ship, she claims her partners experienced pleasure far beyond that of a normal melding, and expresses her desire to mate with the Commander, as Shepard is unlike any other person she has had before. She even suggests that Shepard is too strong-willed to die if the Commander joins with her and proposes that after they complete their mission that they should celebrate by doing so. If they both survive the suicide mission, Shepard can choose to mate with her as promised; however Morinth's claims prove to be incorrect and Shepard painfully dies during joining.

Mass Effect 3
If Morinth was spared and Samara killed, then when Shepard returns to the Normandy after visiting the Council for the first time after leaving Earth, Morinth will send Shepard the following e-mail:

Liara's Shadow Broker terminal may also give access to a series of e-mails Morinth sent to her sisters Rila and Falere. According to the terminal, they were deleted unread.

If Shepard visits the Ardat-Yakshi Monastery on Lesuss and the Commander previously allowed Morinth to go free, in one of the computer terminals in the complex it is revealed that Morinth's emails to her sisters were caught in the extranet filters and the incumbent Superintendent Jethra deleted those before Rila and Falere had a chance of reading them. This fact confirms Morinth's attempts to communicate with the last of her family.

Morinth can appear during the assault on Earth as a Banshee, an Ardat-Yakshi that has been re-purposed by the Reapers, after Shepard destroys the Hades Cannon shooting down most of the incoming Hammer forces. In combat Morinth behaves like any other Banshee, without any special properties.

Trivia

 * Morinth's face is based on American model Rana McAnear.
 * Morinth has a couple of developer oversights associated with her character.
 * Morinth's description in the Squad Selection screen mistakenly lists her as being trained with Heavy Pistols instead of Assault Rifles.
 * Leveling her "Ardat Yakshi" ability to rank 4 causes both the heading and description of levels 1-3 of the ability to change back to Samara's "Asari Justicar" ability. The description, but not the heading, of the overall ability also reverts to that of the Justicar. The only thing not affected by this is the description of the level 4 ability itself. This occurs regardless of which evolution is selected.
 * Towards the end of the suicide mission, if Morinth is left to hold the line while Shepard goes to fight the Human Reaper Larva, subtitles will incorrectly identify Morinth as Samara if she is the one to answer when Shepard radios back to check the status of the second team.
 * A similar oversight occurs during the Lair of the Shadow Broker mission pack. When prompted to select a teammate to accompany Shepard and Liara immediately prior to the sky cab chase sequence, Morinth is labelled as Samara.
 * If Morinth has replaced Samara, Kelly Chambers, and Kasumi Goto notice a change in her behavior, suggesting that her impersonation of her mother isn't perfect. In fact, Kasumi will mention her by name after completion of the suicide mission, urging Shepard not to be enticed by her, as the Commander will die.
 * While part of the squad, Morinth normally mimics Samara's voice outside of her quarters on the Normandy. However, in Fortack's lab on Tuchanka, there is a "Talk to Morinth" node where she will break character and make a comment in her true voice. She has unique dialogue with Mordin and Grunt if either are present. Strangely, neither are surprised by her change in voice.
 * Sometimes on the Normandy SR-2 Morinth will wear her original black costume instead of Samara's costume.
 * The game draws numerous parallels between Ardat-Yakshi and vampires. Both are connected with or described as "demons", both drain their victims of life, and both are known for seducing their victims. In conversations with Samara, you learn that Morinth once set herself up as a goddess and was worshipped by an entire village; many vampire stories refer to entire villages being held in thrall. Most telling of all, the name of the vessel that transported Morinth off of Illium is the "Demeter," the name of the ship that carried Dracula to England.
 * Morinth appears to have gone by the name 'Mirala' when she initially fled, being referred to as such by her mother and sisters. She also signs a letter to her sisters with this name.
 * In addition to voicing Morinth, Natalia Cigliuti also voices Sigrun in BioWare's Dragon Age: Origins - Awakening.


 * Unlike all other squad members, the Shadow Broker does not have a dossier on Morinth. The reason for this may be explained by a piece of unique dialogue.
 * As with all squad members, Morinth has unique dialogue that can be heard at various locations, during missions or assignments, or if a specific squad member is in the selected team.

Morinth Моринт