Ho Yinsen is a fictional comic book character who appears in books published by Marvel Comics, usually as a supporting character of the superhero Iron Man (Tony Stark), who plays a key role in Iron Man's origin story as a mentor and co-builder of his first armor.
Actor Shaun Toub portrayed Yinsen's character in the 2008 superhero film, Iron Man.
Read more about Ho Yinsen: Publication History, In Other Media