Indeed, the absence of parental figures in the game is conspicuous.
Your character has been abandoned by his own parents and, in Inaba, he is again abandoned by his uncle.
The nightly sight of his young cousin sitting alone by the television is a scene of quiet domestic tragedy that runs through the game's story like a melancholic pulse.
Many of the teenagers you are called to save have been abandoned by parents, or placed in positions where they must assume adult roles ahead of time.
In this way, Persona 4 is very much about being a teenager in today's world - and it expresses all that hope and misfortune better than any other video game.