Final answer:
Katherine suggests that she can be tough when necessary and implies that she won't back down.
Step-by-step explanation:
Katherine suggests that she can be tough when necessary and implies that she won't back down. In the given text, it is mentioned that Katherine resolves conflicts to a physical basis when cleverness or charm is not effective. This suggests that she has the ability to handle herself and is not easily intimidated. By mentioning her physical splendor and the fact that the strong and brilliant play her game, it implies that she can hold her own and is not easily dominated.