Wei Chen's personality is quite shameless and gangster-like. When he ends up in a rough situation, he abandons his teammates and runs. This is seen during his first interaction with Ye Xiu in the Heavenly Domain and when Zhang Jiale, plus a few other guilds, decided to kill him when he was commanding Samsara troops. He does a lot of trash talk as well seen through his interactions with various people, especially Ye Xiu, and is quite rough when he is angry.
Despite his shamefulness, he puts Glory ahead of other matters. He chose to sell his guide to Samsara and after being introduced to his new teammates, he shifted his focus to the problem of facing Excellent Era in the future. After realizing they'll probably face Excellent Era at some point, he kept worrying about the matter.