Pang Juan
An alleged descendant of Sun Tzu, Sun Bin was recognized for his brilliance at an early age, while he was still studying military strategy under the tutelage of the hermit Guiguzi. He could recite "The Art of War", which made Guiguzi remark that all his other students should look up to Sun Bin as a role model. Pang Juan, a fellow student of Guiguzi, became sworn brothers with Sun. Pang left early and went to serve the Wei state as a military general, making his name after scoring victories in a few battles. Sun Bin, who was still studying with their teacher then, was invited to enter the service of Wei and he became Pang's colleague. However, Pang was secretly jealous of Sun, because he perceived that Sun Bin was more talented, and had learnt more about military strategy from their teacher than him.