Ebony

Ebony is the black cat and magical familiar of Agatha Harkness, the ancient witch who became governess to Franklin Richards and an ally of the Fantastic Four. The cat shares its mistress's connection to the mystic arts and accompanies her through her dealings with Marvel's first family.

Ebony made their Golden Age debut in 1943, stepping onto the page in The Spirit before carving out a remarkable presence across Marvel's most storied titles — Fantastic Four and Avengers among them. With a publishing history stretching an impressive 76 years, this is a character whose longevity speaks for itself, sharing adventures alongside luminaries like Reed Richards, Susan Storm Richards, the Human Torch, and the enigmatic Agatha Harkness. Boasting team affiliations with the Fantastic Four, the Avengers, and the Inhumans — some of Marvel's most legendary rosters — Ebony occupies a genuinely fascinating corner of comics history, and that one key-issue appearance makes them a worthwhile addition to any serious collector's radar.