What are Jiang Ziya's personality characteristics?

Decisiveness, self-confidence, perseverance and strength:

The history books recorded such a thing. When King Wu attacked Zhou, the sky changed greatly and the flag was blown down (I don't know if the flagpole was made of poor material or the Siberian strong convective cold air went south). After divination, everyone was unlucky, and Duke Zhou even suggested going back to Li, but Jiang Ziya insisted on marching despite these circumstances and argued with everyone until the end. The 90-year-old man picked up the tortoise for divination.

From this incident, we can see some personality characteristics of Jiang Taigong, trusting his own judgment, sticking to his own point of view and imposing it on others. As the commander-in-chief of a country, he shoulders the heavy responsibility of opening up the market. This kind of behavior and personality is exactly what Zhou Wuwang values, which is probably why he became a great official at the age of 90.