At first she was adamant in not entering it on the Metal Fight (saying that the Metal Fight was "the most awful thing" [not exact words] and hating it), but she entered it after seeing Ken fight in it.
Initially, she was resolute against participating in the Metal Fight (expressing strong disapproval of it as "the worst thing" [not exact words]) and disliked it intensely, but she eventually entered after witnessing Ken's performance in it.