Fireworks are consumable items used to distract a nearby enemy, allowing your party to pass without being attacked.
How it works:
When using the Fireworks item it will trigger a small firework particle at your current location. This will reduce all enemy zones aggro chances to 0% for the duration of one leg / travel. So basically this can be used to travel through an enemy zone completely unnoticed, if done within one movement turn.
NB although fireworks will prevent enemies from pursuing the player, they will continue their usual 'random walk' and may still stumble onto the player by chance causing a surprise attack.