
In my dearest opinion. Isabella's relationship with Cesare was done way better than her relationship with Torrisi
They write a character where a core part of her is that she does not want her father to control her life, carries some resentment to him and tells stories of how he was in the day and how her relationship used to be with him... To just not give them a SINGLE interaction EVER. Out of the many cutscenes and dialogues, Torrisi and Isabella NEVER share a single line of dialogue, there is like 4 cutscenes where they are in the same scene...
There is only one time where Torrisi actually says something to Isabella, and that is for her to come and meet her guests (Chapter 4 Opening Cutscene) and nothing else from there on.
Torrisi only talks about how protective he is of Isabella A LOT and the only dialogue to come out of it with him and his daughter is "Isabella, come, greet our guests."
Meanwhile, Isabella and her cousin Cesare interacts a bit throughout the game then and there. Even if its small dialogue interactions, the fact that Cesare is not that big of a part in Isabella's character yet is the character who interacts most with her (Aside from Enzo and Valentina) says something. He is even the last person that Isabella interacts with before leaving the life behind. So them not directly not talking all the time or about each other all the time, they do interact with each other then and there (Despite being cousins). Isabella's character does not even drive around Cesare that much, he is pretty much just her cousin but Cesare's main character core is tied to Enzo as his best friend.
So for the writers to write a character who revolves more around "Daddy issues" and barely her cousin, just for her to interact with her cousin then and there yet never interact or be seen in just 4 scenes together is a HUGE writing flaw and is easily this game's biggest writing issue.
Isabella and Torrisi's daughter and father dynamic is NOT that great while Isabella and Cesare's cousin dynamic is better because they actually interact decent amount of times.