The roster is the mechanic
In most games of this type everyone starts identical and skill decides everything. Free Fire threw that out. You choose a character before you drop and each one carries an ability that changes something concrete: how fast you move, how long your armour lasts, what you can see, how quickly you recover.
That means a squad is a set of stacked abilities rather than four identical players, and the pre-match choice matters as much as the aim. It is also why so much of this quiz sits on the roster. Knowing the characters is not trivia here, it is knowing how the game is played.