As focused as she was, Carmen growled as her target escaped her sight a third time; but now that she had seen it directly, there was far more happening than him simply escaping her line of sight. Rather, the shadows seemed to reach out to cater for him - not at all unlike an ability an affiliate of hers had used. Regardless, the shapeshifter had indeed jumped to the roof as a lure above anything else, but she had hardly expected for it to work so quickly.
"-Oh?" she instinctually raised her shield, turning to her left as the vampire raised in turn. Finding herself short for personal space, a steady pace back followed another, until Null warned that two more would lead her off the edge.
Barely over six feet away, the pale-skinned assassin stood threateningly, flexing his bloodied claws at his sides. Ever grinning, each of his seventeen words were saturated with ill undertones - and to Carmen, not one seemed to hold any relevance to their situation. Still, Carmen was not one to simply dismiss conversation, if only so it gave insight into her enemy's motives and mindset.
Shrugging off her confusion, her own fanged mouth opened - passing an inhuman, airy shrill, undertoned with a growling yet high-pitched murmur. Carmen herself flinched at this; it was the first time since she had tried such a combination of vocal chords, and apparently doing so had rendered her words incomprehensible.
Ignoring the mishap, she swallowed and paused, actively loosening her earlier modifications.
"Right," She started again with immaculate confidence, "Do I... uh." Which lasted until noticing her tone now perfectly matched that of a kitten's, phonetics included.
"Nyearrrrww..." Much to her distraught, her audible frustration only made her sound even more docile; but knowing the capacity of the killer before her, her embarrassment was not let to distract her from the task at hand. Her shield-arm held firmly in front, albeit with a weak grip, and her revolver was placed in her pocket, doubting she would need it in such close range.
"...I'm afraid I'm n't about t' discuss anything while like this." Her words were definitive, and paced such that her slurring was minimal.
"M'ind if we talk after you're in a jail cell?" She said with a forced hint of optimism.