The Stepford Cuckoos (also known as the Trinity) are a group of three telepathic mutant sisters, who appear as bosses in X-Men Legends II: Rise of Apocalypse. They are the former students of Emma Frost, who they ultimately blame for the death of their fourth sister, who died on a mission. So they join forces with Apocalypse, in order to extract their revenge.

In the game, the Cuckoos are voiced by Jennifer Hale (who also voices Scarlet Witch).

X-Men Legends II: Rise of ApocalypseEdit

Prior to the game, the Stepford Cuckoos were a group of four mutant sisters, who studied at the X-Mansion under the tutelage of Emma Frost. However, after one of the sisters was killed during a mission, the other three left the X-Mansion and blamed Emma for her death. So "to pay Emma back", the remaining Stepford Cuckoos later join forces with Apocalypse.

In the actual game, the Stepford Cuckoos are now residing in Apocalypse's ancient Madri Temple in Canada. During the X-Men and the Brotherhood's mission in Genosha, Apocalypse destroys the X-Mansion and in the process, obtains technology based on Cerebro. He later uses the technology to create three mini versions of Cerebro and place them in the Madri Temple. With these machines, the Cuckoos use their psychic powers to put a number of world leaders into comas, making Earth's military forces completely useless. In the process, they're protected by one of Apocalypse's Horsemen, Holocaust.

Later, the X-Men and the Brotherhood travel to the Madri Temple to help Emma stop the Stepford Cuckoos. When they meet up with Emma, she informs them about the three mini Cerebros holding the world leaders into comas. Even though the team destroy all three devices and the leaders finally reawake (off screen), Emma decides to venture through the temple on her own, in order to find and defeat the Cuckoos. However, once she finds them, she is quickly defeated by her former students, who then hand her over to Apocalypse for his special experiment involving Harmonic DNA. The Stepford Cuckoos then encounter the X-Men and the Brotherhood, who have just arrived too late to save Emma. After a brief conversation with the team, the sisters fight them alongside Holocaust. However, despite their combined might, Holocaust and the Cuckoos end up being defeated. After their defeat, the Madri Temple is completely disbanded.