Fei Yao

The one man in the Wei command who reads the letter right — 'Zhuge Liang is very crafty, and Jiang Wei is very knowing… we may fall into a snare' — and then volunteers to walk into it himself so the risk falls on him rather than his chief. Given fifty thousand by the Xie Valley, he is drawn through three feigned advances and retreats over a day and a night without rest, takes the signal fire for Jiang Wei's, turns to attack and finds Guan Xing and Zhang Bao instead. Driven into a ravine that fills with flame, with the pursuit behind him, he puts a sword to his own throat.