Cassie painted the other party's face and she used Rob's own blood to do it.
As a matter of fact, if Kyle had not witness what exactly happened with two of his perfectly working eyes, he could easily mistake Rob as somebody who had fallen victim by the attack of a savage beast.
The girl surely made good use of his body to vent her frustration.
On the other hand, as soon as Cassie was back on her feet, she stood towering before Rob and glowered at him.
From the current looks of it, it seemed as though even after what she have done to him, it still would not be enough to quench the anger in her heart.
Truth be told, even Kyle, a demon himself, could not help but feel shock when he learned that Cassie has a knack in violence.