
Evan is just antagonist and will turn villain. He's just obsessed with being more powerful than his teacher out of envy. He plans to do a sacrificial ritual with her (kill her to steal all of her mana from her), it didn't do him much good to go to the lost lands with the Carsilion family stone to become more powerful. He for now he is playing the victim, to avoid the consequences and is waiting for an excuse to escape again and destroy everything.

Jeffrey has always been the ML (since chapter 1, the couple with the word LOVE are Jeffrey and Charlotte, he has the same hair style in chapter 8 and a lot of hints and clues), the feelings between Charlotte and him are mutual but she is afraid of being weak (and love is a weakness for people powerful like her)

he is not (he is only the villain of the story, a beast villain), he comes to destroy her. They are going to perform a sacrificial ritual to steal all of her powers (kill her) and destroy everyone. If not look at this and check these chapters (chapter 10, chapter 43, chapter 54: what the false master says):
and this pdf (use censorship because many are carried away by a pretty face and do not pay attention to what they are told). Do you still think the same? All the disciples (Carsilion, Dan, Yulian, Eldow) and Charlotte declared war on the demons are not going to allow them to destroy the world and kill innocents.
https://drive.google.com/file/d/1fBcIS4tbezh6zjPkxerAStibWo0q7EVh/view?usp=sharing
Thanks to the translation
Evan's dialogues are so empty ... It is not the translator's fault, I mean that his dialogues are not worthy of an ml, the truth is that I don't see him as ml, the manhwa is about charlotte and her 5 disciples therefore the six are protagonists and the story is about them, charlotte sees them as children that she raised, she is only trying to help them, sometimes I see Evan as an enemy who in the future he will show his true colors, his obsession I don't like it, I got tired of the typical cliché where mc ends up with the enemy, I hope the ml is jeffrey, now it is not seen but later on he becomes more relevant to the plot
The dialogues between jeffrey and Evan are so different, charlotte is taking notice of jeffrey (thinking about his words is a good sign isn't it?)
Thank you very much translator, happy new year to you