It wasn't as if Zenith wanted to remain standing in the corner, he'd have loved to get closer and observe up close and personal, but his master had commanded him to stand in the corner until he was needed by him and as long as the stupid man breathed the dragon was compelled to obey.
Her prey, for that was all the man was by now, fell into a helpless stupor. He groaned softly at the soft kisses, enjoying her attention in his last moments. Even as her fangs sank into his neck he couldn't muster any struggle. It wasn't until his throat was ripped open, spraying his blood onto her olive skin - and the bed - that his body reacted to the threat. Of course it was far to late to save itself.
Zenith's eyes, red as the blood staining Wish's flesh, dilated as he watched his former master's body twitch and finally become still as the vampiric girl feasted on his lifeblood. It was rather glorious to watch a predator trap and destroy it's prey.
Of course being the predator was even more fun.
With the master dead, the dragon no longer need obey the command to remain banished to the sidelines. It did mean that before very long Zenith would be forced to return to his prison, but first he needed to collect on his contract. He approached the bed, gazing down at Wish with a toothy grin, flashing his fangs at her. "Don't be greedy now. You may have earned his blood, but his soul is mine."