But you are aware of her weakness , thus you can keep an eye on this. When i play kokoro, i always think i'm fine until someone punish me badly for my unsafeness.
A lot of characters have movesets which are at least 50% unsafe. Some are closer to 80% such as Gen Fu and Jann Lee, Kasumi is at around 90% unsafe and Phase 4 is about 95% unsafe on a rough guess.
Most of the time fast characters are really unsafe (with the exception of Pai) and slow or linear characters are usually safe.