From the game:
Youʼll want to define your characters before starting. [Y]ou can define why they are undertaking this mission [before the game], or you can wait until the complex is defined.
As you move through the complex, youʼll be defining its rooms one by one. If youʼd like to form a general concept for the complex, disk, and means of entry and escape before you start defining rooms, do this as a group before the first player takes their first turn.
For characters, suits are correlated with certain themes:
Spades: Violence, especially excessive, merciless violence.
Hearts: Love, lust, seduction, and any strong emotion.
Clubs: Determination, willpower, endurance, overcoming odds & suffering.
Diamonds: Intellect, strategy, orchestration, organization, learned skills.