The way he keeps him conscious is by calling his name!
"Yamete Fuyuki!!" shouted Mawaru who desperately called fuyuki's first name even though she was now the master. However, Mawaru's words did not succeed in resuscitating his soul at all.
A person who is already stricken with adversity, and when he feels provoked, surely he will have no desire to kill even if he is blessed by the holy spirit (celestial- holy) that is in him.
Basically, humans are blessed with the spiritual energy of Yin and Yang.
* Yin-Yang or Yin and Yang is a concept in Chinese philosophy that is usually used to describe the interconnected and opposite nature of forces in the world and how they build on each other. The concept is based on the origins of many branches of classical science and can be used as a guideline for Chinese medicine and is a principle of martial arts in China, for example Baguazhang, Taijiquan (Tai Chi), and qigong (Chi Kung) and Ching divination.