Spoiler (repost)
The crown prince is the ML. In the first timeline, he realized that Veronica is a fake one and he fell in love with her. He kept his feelings a secret tho cuz if people realize that she gained his favor, it will be like an opportunity for the grand duke to gain support and more connection. He considered their child, Ian, as a mistake not becuz he hates him. Since Ian is a boy and already a potential heir, the grand duchy gained more support so basically his purpose for avoiding fake Veronica and not confessing his feelings was deemed useless.
Also, it seems like in the first timeline, he killed the real Veronica after the fake Veronica died and protected their baby.
“Ian, your mother. She was the most beautiful and well-bred woman in the world. So let's remember. Even though she lived as a shadow, she was a better queen than any other. Only you and I should not forget, Ian. Do you understand?"
But in the end, he was killed (not sure) by the grand duke as revenge for killing his daughter.
omg, ty for the info, I think he's at least is better than Ruve in 1st timeline, the only fault he has is he never told anything to reassured Elena, than I think I can love him in both timeline now (I love Ruve 2nd time, but hates him in 1st XD)
from the chapter 0 I kinda see that the prince shall be the ML right? I don't think this is a spoiler since we kinda knew if we read the 0th chapter, but what's with the prince's act in chapter 13? it pissed me off (╯°Д °)╯╧╧