The Citizen is the default class in DarkRP. Players first joining the server will usually spawn as this class (Unless the server has a different class set as the default)
The Citizen is the most basic class of players in Roleplay. As such, they are the lowest class in Roleplay society, besides the Hobo. The player model for them is mostly a HL2 Citizen. Players are automatically added to this class when they join a game. They start with no weapons. They are subject to all rules and can be arrested. When players are demoted, they become a regular Citizen.