Looks like Komachi is using distance manipulation to literally play with herself. Iku can't even tell if she's going to hit or miss the ball on a given swing, so she'll lose once the Shinigami really decides to place the ball beyond her reach.
Stop dreaming and be the umpire.I know what you mean, though.Centre at the last second...!!You hit that one so easily, it scares me!Take that!!Filled With EmotionPredictedShe won't make it...!!Why, thank you!Oh... To see Komachi take something this seriously...It returned!?