This Rabbit or bunny enemy is a Peculiar Machine enemy in NieR: Automata. You need to deal a large amount of damage to it in order to wake it up. You can just hack it using 9S. Successfully hacking it will defeat it immediately even on hard mode. This enemy will drop the powerup part L, one of the most valuable items in the game; it is a crafting material in the game that is necessary in order for you to upgrade the Pod to its Max Level.
2B is an all-purpose battle android, deployed as a member of the automated YoRHa infantry. She is equipped with a multitude of weapons for close quarters combat and can attack from range using the Pod support system. Her eyes are obscured beneath her standard-issue military visor, which she rarely removes.
Source: https://nier.fandom.com/wiki/YoRHa_No.2_Type_B
9S is a scanner type android who served during the 14th Machine War. He has an attack function, but it is an android that specializes in investigative purposes—a member of the automated infantry squad, YoRHa, who triumphs in hacking-based information collection.
Source: https://nier.fandom.com/wiki/YoRHa_No.9_Type_S
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