Esme Cuckoo

Esme is one of five identical telepathic quintuplets — the Stepford Cuckoos — cloned from Emma Frost and introduced as students at the Xavier Institute. Like her sisters, she shares a powerful psychic hive mind rooted in their linked mutant telepathy.

Few Modern Age debuts carry the eerie elegance of Esme Cuckoo, who first stepped onto the page in Grant Morrison and Ethan Van Sciver's New X-Men #118 in 2001 — part of one of Marvel's most celebrated and unsettling reinventions of the X-Men mythos. One of a set of identical sisters, Esme is inseparable from the uncanny dynamic of the Cuckoos as a whole, sharing her world with powerhouses like Emma Frost and Wolverine while her sisters Phoebe, Celeste, and Sophie orbit her story just as closely. With five key-issue appearances to her name and a presence that has persisted across 24 years into titles like Marauders, she's far more than a supporting player — she's a figure collectors return to, a Modern Age original whose introduction helped define an era of bold, cerebral X-Men storytelling worth every back-issue hunt.