Blythe would have been able to reach Kain and do some amount of damage if Alessa hadn't acted faster than her. Alessa's aura hadn't moved and Kain was before her, so she had been caught completely off guard when something knocked her to the side - something that had pushed her, but felt nothing like hands. She almost turned to then attack the other young woman, but Kain had moved quickly as well, and before she knew it, her hands were at her back.
She began fighting with every ounce of strength she possessed, kicking and cursing them in her demon tongue. Her senses were also overwhelmed by the two corporeal beings, one of whom was dragging her over to the chair. She wanted to fight Kain off and slay him. But she also wanted to break free and impale Alessa with her hidden knife. Their blood was pounding in her ears and she couldn't stand it.
When Kain finally got her into the chair and Alessa had gone for the rope, Blythe stopped kicking, snarling at the two people thwarting her plans of escape.