As Fang Mu made contact with Yan Yubanruo, he found Yan Yubanruo was the most distinctive of all his guardian beasts due to its personality.
This was also largely related to Yan Yubanruo's high intelligence.
At first, Yan Yubanruo gave Fang Mu the impression of a cold and aloof queen, but gradually, Fang Mu found that Yan Yubanruo was both aloof and stingy.
She spent all day forcing her Ghost Servant Spectral Fish Princess to condense souls, continually exploiting the Fish Princess.
Fortunately, as a Ghost Servant, the Spectral Fish Princess could gain energy from Yan Yubanruo and didn't need to rest.
Otherwise, the Spectral Fish Princess would probably have been exhausted by Yan Yubanruo long ago!
Ironically, the Spectral Fish Princess greatly enjoyed being at the service of Yan Yubanruo, leaving Fang Mu unable to intervene.
Consequently, Fang Mu decided not to disrupt Yan Yubanruo's relationship with the Spectral Fish Princess.