No need, each Persona is independent from its predecessor. Although a good knowledge of the monsters will help familiarize you in your random encounters. I would strong suggest to revisit Persona 3 and Persona 4. And also if you have the chance, the original Shin Megami Tensei series. The only one available for playstation home console is SMT Nocturne.

Digital Devil Saga is also available via PSN, certainly a spin off worthy of note.

u slowpoke lah u.

u even come late for the extraction point.