Genin are the lowest level of ninja and also the ones that display the most difference in power. When they become genin, ninja start to do their bit for their village's economy – being sent on missions that the village gets paid for. They are typically sent either on D-Rank missions, which are almost entirely risk-free jobs of manual labour, or, rarely, on C-Rank missions, which are a cut above that and begin to verge on real "ninja" work that have a very low possibility of risk to the ninja involved. Genins are not put into any squads but instead trained by a jonin in teams of 3.
The only known genin in the series is Orihime Sarutobi.