The Blood Guardian has finally started to process to take the other half of his soul to his consciousness.
Of course, he was doing this using his instincts just as instructed by the other half of his soul.
After all, this was the only real idea that he had in order to take the other half of his soul to his consciousness.
It was nothing weird.
And it seems that...the Blood Guardian was finally done in doing this as he...was now back in Lucifer's body.
Right, the Blood Guardian was now back in Lucifer's body, taking control over his body.
And this made the Blood Guardian move and inspect his surroundings in a hurry as he thought that something must have happened that would make him go back to his lord's body.
Even though the Blood Guardian did take the process seriously, that does not really mean that he would really leave Lucifer unattended.