Fun fact in the novel it was done differently Lin Tuo betrayal was not reveal up until the time that Ji Yue went to attack th Moon Knight Corps to capture Bai Jin all because Lin Tuo let them enter being an infiltrator but he was sincere of being a Teacher for the class, Basically Lin Tuo is the first person to discover Ji Bai had turn into Bai Jin in campus when Bai Jin return to moon knight and only reveal to Lin Tuo her identity, basically Ji Bai trusted Lin tuo so much that he would be trusted with the truth except being Bai Ji though. What happened was Ji Bai transform into Bai Ji to try and discipline Ji Yue but instead got sneaked attack and then Ji Yue killed her as Bai Ji and then laughing only for Bai Ji to come back from the dead to punish Ji Yue but ofcourse just like Manhua spared her thanks to Ji Bai conscious only for the same incident to happen and then fused to turn into Bai Jin.
P.S. Different Personality does not exist in Novel, Novel readers once told me this and I was able to confirm it from how the dialogues and text words were use.
I was quite surprised too when I saw what they did with the Manhua cause I read the WN for that arc first before seeing it happened