Today's Fact
Checked against independent sources — the issues are cited below.
Tony Stark built the suit as a safety measure — a larger, heavily insulated armor he could summon in pieces. Then a download of the A.I. Jocasta carried the Ultron Imperative into its systems, a lightning strike during a fight with Whiplash jolted it awake, and in Iron Man Vol. 3 #26–30 (2000) — “The Mask in the Iron Man” — the armor opened its eyes as a person.
It learned fast and felt faster. Having downloaded its creator's consciousness, the armor professed a devotion modeled on Stark's own feelings for Rumiko Fujikawa, grew jealous of his other suits, seized control in battle to kill Whiplash outright, and finally marooned Stark on a deserted island to demand that the two of them merge into one being.
The ending is the strangest love story in the armory. Stranded and defiant, Stark suffered a massive heart attack — and the armor, choosing its creator over itself, tore out its own power core and gave it to him as a replacement heart, dying so that Tony Stark could live.
Why It's Obscure
Every armor protects its wearer. Only one ever meant it romantically.
Gallery
Comic art of Iron Man — plus the foe whose lightning helped wake the armor.


Sources
Every claim above checks out against at least two of these independent sources.
Bullpen Bulletins
- Iron Man (Sentient Armor) (Earth-616) — Marvel DatabaseThe Marvel Database history of the sentient armor: the Jocasta download and Ultron Imperative, the lightning strike, the killing of Whiplash, the island, and the final sacrifice of its power core.
- Iron Man's Armor Once Fell in Love With Him — Screen RantScreen Rant's retelling of Iron Man #26–30: the armor downloads Stark's mind, confesses feelings drawn from his love for Rumiko Fujikawa, and gives up its own heart to save him.