p5 has many callbacks to p1 and p2. one not many people talk about is lavenza's progression from royal to tactica where she ages up, sort of like aki in the p1 manga.
>https://www.youtube.com/watch?v=K1ih_gTanJU
there is also lavenza's boob envy which is showcased in p5 dancing where liz makes a joke in her dance about it. clearly she has a desire for big breasts.

this means bigvenza is canon