Morinth might be a character that not every player got, as the only way to have her join the squad is by completing Samara's loyalty mission and choosing to instead help Morinth. She is in fact Samara's daughter, and bears an exact likeness to her, also sharing her abilities. If you choose Morinth, she deceives everyone on the Normandy besides Shepard into thinking she's Samara. Even worse, if Shepard chooses to romance her it ends in death, literally. Talk about a buzzkill.