Clover

Clover is like a girl version of Boxer, in fact, she is a good friend of Boxer.

Suspicions of pigs breaking the rules
She always suspects the pigs breaking the rules and changing the rules. One example of this time is when the pigs started sleeping on beds. She knew they were breaking the rules by doing this. After this, the pigs changed the rule to "No sleeping on a bed with sheets" as they weren't using sheets. Although most of the time, she just blamed herself for forgetting the rules.