I am urgently looking for the name of a character from the Spring and Autumn Period and the Warring States Period.

The following is translated from historical records in vernacular. Some people slandered him. It is true that Wu Qi, a native of Wei, was suspicious and cruel. When he was young, his family had a thousand gold in savings. He went out to seek official positions in vain and squandered all his family property. People in his hometown and neighbors laughed at him, so he killed more than thirty people who laughed at him. Then he escaped from the east gate of Weiguo. When he said goodbye to his mother, he bit his arm and said harshly: "I, Wu Qi, will never return to Weiguo unless I become prime minister." ’ So he worshiped Zengzi as his teacher. Soon, his mother died, and Wu Qi did not go back to attend the funeral. Zengzi looked down upon him and severed the relationship between master and disciple. Wu Qi went to the state of Lu to learn the art of war and serve the king of Lu. Lu Jun suspected him, so Wu Qi killed his wife to express his intentions and use it to seek the position of general. Although the State of Lu is a small country, it has the reputation of being a victorious country, so the princes and other countries will plot against the State of Lu. Moreover, the State of Lu and the State of Wei are fraternal countries. If Lord Lu re-employs Wu Qi, it would be equivalent to abandoning the State of Wei.