Persona
The Persona series has become well known for its complex and emotional character development. Persona 3 and 4 feature “social links,” which allow you to bond with your party members and other characters scattered across their worlds. These social links give you interesting bits of backstory or development on characters, and deepen the bond between them and the main hero.
A Persona game could benefit from even more character development brought by integrating some kind of TV show element. It could be either live-action or anime to match the game’s style, but the focus should be on giving players even more insight on the individuals that inhabit the game’s world.
Different episodes could be made for each party member and significant character, telling their stories when they aren’t actively interacting with the hero. Maybe you follow a character on their day off, while they struggle with every day high school life. The potential to cross the game its own high school, slice of life sort of show is huge. It’s just one more way the Persona games could develop their already intricate world and characters.