In psychology, the term "flying monkeys" is commonly associated with narcissistic abuse. It describes individuals who act as enablers or allies of a narcissist, doing their bidding and participating in their manipulative behaviors. These flying monkeys may not necessarily fear the narcissist but are more likely to be under the narcissist's influence, possibly due to manipulation, coercion, or a desire for approval.
On the other hand, a narcissist is someone who has a personality disorder characterized by an inflated sense of self-importance, a constant need for admiration, and a lack of empathy for others. They often manipulate and exploit others to meet their own needs.
Since neither flying monkeys nor narcissists are actual beings but rather psychological terms, it wouldn't be accurate to say that a flying monkey fears a narcissist. Instead, it's more appropriate to say that they may be influenced or manipulated by the narcissist's actions and behaviors.