What is the name of the chrome-armored First Order captain?

The story behind the answer

She’s the chrome-armored First Order stormtrooper commander introduced in The Force Awakens, recognizable by mirror-polished plating and a flowing cape. Captain Cardinal is a different First Order officer from the novels, notable for his red armor and role as a trainer; Captain Needa is an Imperial officer from The Empire Strikes Back; and “Rook” evokes Bodhi Rook from Rogue One, a defected pilot—not a captain.

Her gleaming armor is coated in chromium reputedly salvaged from Emperor Palpatine’s Naboo yacht, projecting elite status and offering enhanced protection. Portrayed by Gwendoline Christie, the character became a striking visual icon of the sequel trilogy, symbolizing the First Order’s cold, stylized militarism.