So, due to agent 4 being a teenager, most of her cells are teenagers, causing the city to be run by teenagers, making it have few laws.
As a result, graffiti is all over and some of the blood cells have splatoon turf war type battles.
How they work is if a blood cell sprays their graffiti on another's street-property, and the blood cell who catches the other one doing graffiti on their turf, gets to decide whether the inky battle commences.
Whatever team wins selects a random team member to spray paint a random member of the opposite team's face!
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