Final answer:
Grady Bishop's main personality trait is not clearly depicted in the provided text excerpts, which focus more on Jane Withersteen and other characters without providing direct information about Grady Bishop himself.
Step-by-step explanation:
In The Women in the Snow, Grady Bishop's main personality trait is difficult to determine from the provided text excerpts, as they primarily focus on Jane Withersteen and other characters. However, by carefully examining and interpreting the context in which Grady Bishop or his actions might be mentioned indirectly, we might infer some potential traits. Unfortunately, the given passages do not provide enough direct evidence to confidently assert a main personality trait for Grady Bishop.