According to A2, 9S is a 'high end model', implying he is among the newest Scanner types. Usually working alone, he, along with other S-type models, are deployed on the frontlines and act as YoRHa's main intelligence gatherers. ' 9S in particular has a wide range of rich emotional expression, which makes him noncompliant with YoRHa standards.' - NieR: Automata World Guide īeing a Scanner model, 9S is naturally curious about the world around him-especially in regards to the machine lifeforms. SPOILER ALERT - Plot details for NieR:Automata follow. That is why you, the YoRHa forces, exist: