Read more about Stepford Cuckoos at: Wikipedia

Official Site: Marvel Comics

The Stepford Cuckoos are a set of fictional mutant psychically-linked quintuplets (Celeste Cuckoo, Esme Cuckoo, Irma "Mindee" Cuckoo, Phoebe Cuckoo, and Sophie Cuckoo) of the Marvel Comics universe, students at the Xavier Institute for Higher Learning. When placed in alphabetical order, also denote their respective ages—with Celeste being the first born and Sophie being the youngest.

Originally calling themselves the Five-in-One, with the deaths of Esme and Sophie the remaining sisters are now known as the Three-in-One in New X-Men #149-150.

First appearing in New X-Men vol. 1 #118, they were created by Grant Morrison. Their origin, as the artificially created "daughters" of Emma Frost, is revealed in X-Men: Phoenix - Warsong.

Their name is an allusion to The Stepford Wives and The Midwich Cuckoos. The Cuckoos and their abilities are roughly based on those of the "Paper-dolls", telepathic quadruplets from a 1964 novel by L. P. Davies.

Stepford Cuckoos has not been a contender in any CBUB matches.