Nope!
[Chasing after her victim just as quickly as he comes back for her, Shiki brings her blade up to lock against Hei's as an effective block. She braces, but before it can be reduced to a power struggle, the second strike aimed for her side clips her ribs and Shiki twists away in reflex, turning his knife away from her as she goes, not stopping for even a quarter of a second to think. It was close there, but the odds hadn't tipped away from her yet-- if she'd stayed deadlocked with him, it would have been a certainty. Physical strength is not her forte.
Speed and skill are. The open palm of her left hand comes up in the next moment, without hint of injury or lag, to connect solidly with Hei's jaw; perhaps stun him for the second she needs to drive her knife into him]