李肃 / Li Su (late Han)
李肃 / Li Su enters the wiki through Hanji 963 as the officer 吕布 places among disguised guards for the anti-董卓 ambush. He makes the first spear strike at the palace gate, but Dong Zhuo’s armor prevents it from being fatal, leaving Lü Bu to finish the killing.
Hanji 965 adds Li Su’s post-assassination mission against 牛辅. His mission fails: Niu Fu defeats him at Shan County, Li Su flees back toward Hongnong, and Lü Bu executes him.
The page is source-scoped because the episode uses Li Su primarily as a transition point. His failed attack shows that Dong Zhuo’s remnant forces are still dangerous after the assassination, while his execution adds to the coercive and fearful atmosphere that makes later 李傕 and 郭汜 decisions legible.