Relationships are built through both combat and social interactions. As characters bond, they unlock (typically C, B, A, and S).

While your query mentions "ファイル" (which translates to "File"), it most likely refers to the series , as it is renowned for its intricate relationship mechanics and romantic storylines.

: You increase support by fighting in adjacent spaces on the battlefield, sharing meals, or giving gifts.

: This is the pinnacle of the relationship system, reserved for the player character's chosen partner. It often culminates in a confession of love or a marriage proposal. Notable Romantic Storylines