
He still is a piece of shit. Dont forget that in one chapter he legit said that he only wanted the MC because his half brother wanted her. At the beginning he was only with her since she had the necklace that his mommy wanted and that being with her would help his case to be king.
Right now he is acting like a sad puppy cause he is experiencing the whole emotion of " how can you not like me, it makes me want you now".

Oh yeah, also, he's still young, probably in his late teens or in his teens as Ariadne is still 15 years old, I'm currently rereading this to see if I missed something about Cesare (I didn't give af about him before)
In chapter 36, he got a letter from a young lady who he pursued before, he stood all night at the young lady's window frame until morning, but after getting her heart, he ignored her letters. It's like a little kid getting bored of a toy, and that's what happening with Ariadne, especially because Alphonso likes her.
His young age (and no responsibility, as he was the regent for nine years in the past) contribute to why he's not cold as we have seen him being cold in the past. He's just a harmless young man right now, compared to him killing people in the past.
How did Cesar become such a POS in the past life when he’s so in this life smh