|Real name:||Ho Yinsen|
| Gender - Male|
Height - 5'10
Weight - 165 lbs
Eyes - Brown
Hair - Grey/Brown
Dr. Yinsen was an Afghan Dr who was captured by the terrorist group, the Ten Rings.
He was held captive for a period of time when Tony Stark was also captured and both were forced to build a Jericho Missile. They instead build the Iron Man Mark I but to but Stark time to charge the suit, Yinsen gave his life forever changing Stark's life for the better.
A Muslim man from a small Afghan village called Gulmira, he met Tony Stark previously at a technical conference on integrated circuits given by Stark in Bern, though he understood that Stark didn't remember as he was so drunk. A master of technology, Yinsen removed much of the shrapnel from Stark's body, and helped keep him alive long enough to build an electromagnet in his chest to keep the remaining shrapnel from entering his heart. Under captivity, Stark and Yinsen were ordered by the terrorists to build a Jericho Missile, the kind Stark was demonstrating to the US Military or they would be killed. However, both men knew that they would be murdered either way and planned an escape instead. He then helped Stark keep the Iron Man Mark I suit he was making a secret from their captor, Raza, and assisted him in its creation. When Tony asked about Yinsen's family, Yinsen merely noted, "I will see them when I leave this place." Yinsen also pointed out the damage wreaked upon the region by the terrorists, using Stark's own weapons, and asked if this is what he wished "the legacy of the great Tony Stark" to be. During the escape he was killed while attempting to stall the guards long enough to buy Stark enough time to charge the suit. In his dying breath, Yinsen told Stark "Don't waste your life."
- In a way, Yinsen is the creator of Iron Man, by changing Tony's view on the world and helping him see the destruction his weapons are creating.