Character Profile:Wei Character
Sima Yi 

Image of Sima Yi.
Name Hanzi
Pronunciation: See-mah yee
Wade-Giles Spelling: Ssuma I
Japanese Name: Shi Ba I
Style Name: Zhong Da
A.K.A. : n/a
Allegiance: Wei
Lifespan: 179-251 A.D.
Relations:
father (Sima Fang)
sons (Sima Shi and Sima Zhao)
grandsons (Sima Yan and Sima You)

Sima Yi served Cao Cao and Cao Pi. His son Sima Zhao conquered Shu, and Sima Zhao's son, Sima Yan, eventually forced Cao Cao's descendant to abdicate. Sima Yan established the (not so) Great Jin dynasty. A more detailed profile is forthcoming.