Well, Vegeta would be a likely character. He might be initially suspicious of the female Goku. Maybe he thinks she's a threat or just can't believe there's another Goku - like being. He could be there to add some comical moments as he tries to understand the situation.
Xiao En was described as a Level Nine master in the TV series " Celebrating Years." Even though he had taken poison for twenty years and was seriously injured, he could still fight with other experts. Therefore, it could be confirmed that Xiao En's combat strength was at least at the ninth rank. However, it was impossible to determine if he was the strongest Level Nine expert.
Xiao En had been caught by Chen Pingping. Chen Pingping was the Director of the Qing Overwatch Council. In order to capture Xiao En, she personally led the Black Knights into enemy territory and sacrificed her own legs. Xiao En had been imprisoned for 20 years. During this time, he had experienced many assassinations, but in the end, he had been rescued by Fan Xian. The specific details of the arrest and background information may need to be further understood from other sources.
Gao Yingjie, a character in the eSports novel " Full Time Expert " and its derivative works by Butterfly Blue. He was a professional esports player, a Launcher in the Glory Professional Alliance.
Mu En, a character in the eSports novel " Full Time Expert " and its derivative works written by Butterfly Lan. He was a professional esports player and a Cleric in the Glory Professional Alliance.
While waiting for the anime, you can also click on the link below to read the classic original work of " Full-time Expert "!
In reality, Fan Xian and Xiao En had no relationship in the TV series " Celebrating Years." Chen Pingping used Xiao En's suspicious nature to make him mistakenly believe that Fan Xian was his grandson. He used this to pry out the secrets of the Temple. Chen Pingping had been sending false information to Xiao En, making him believe that Fan Xian was his grandson. He had also planned to train Fan Xian to become someone who hated Northern Qi and let him destroy everything Xiao En had. Fan Xian had never heard of Xiao En, so he answered Xiao En's question truthfully. In the end, on the way to escort Xiao En back to Northern Qi, Xiao En took the initiative to tell Fan Xian the secret of the Temple and revealed Fan Xian's background. Thus, Xiao En had mistakenly thought that Fan Xian was his grandson, but in reality, the two had no relationship.