An archaeologist married to a man who keeps turning into somebody else, who ends the series as an avatar in her own right.
Layla El-Faouly is Marc Spector’s wife, an archaeologist and adventurer, and May Calamawy plays her in Moon Knight. She becomes the avatar of the goddess Tawaret, which makes her the Scarlet Scarab. The reader who sent this list called her the love of Marc Spector who later became the Scarlet Scarab, and Wikipedia adds one thing: the character did not exist in the comics before the series, and made her comics debut in 2023.