Character Concept is how a character is envisioned by the player that directs them. It often begins with a historical or literary reference point, then builds based on what options are available by Setting. These develop into Character Aspirations. Many times, a character concept will fit into one of the typical types of Pathway of Experience as an easy starting point. The big things that inform the concept will be Race/Species (Creatures of the iVerse) and a calling, pathway or class. What is available to characters is constrained by Setting and the Game Master’s Campaign.
You can have multiple cultural perspectives. Each one serves to define the Character Concept. These are quite often defined through a Basic Cultural/Regional Experience. These will serve to quickly help define and guide your character in Role-Playing scenarios; It is also an excellent measure for GMs to base rewards on.
Large and dominate themes that are part of, and have direct bearing on, the setting at large.