I feel so bad for her because she tries to fix the family, feeling like its her responsibility to do it and not just in the healing sense but also all the family issues and fights amd everything. The both of them really want to protect and defend Mirabel from Abuela but at the same time they're also scared of Abuela and so they don't defend her as much as they want to.
Agustin is so accident prone but Julieta loves him for it however she does worry about him and she tends to show it as like 'Oh my word not again' kind of thing.
I feel like Julieta is the most mature and responsible of the triplets a d so she puts the pressure and responsibility on herself, relating to the thing of trying to fix everything. She feels like she needs to be like another parent to the family.