Pan stayed staring at John for a while, wielding his black blade ever so tightly. John didn't necessarily scare him, but the sight and aura of his weapon did. After all, it was a weapon that sent chills down his spine.
They both watched for the slightest of movement from each other. Neither John nor Pan made a move. Pan knew that John wasn't as weak as he seemed as he did hold off Delia before the Goddess of darkness came to his rescue. Although neither he nor the other gods have seen Delia or her body for a while, they just assumed the Goddess of Darkness had dealt a critical blow to her, and she was in hiding while recovering.
John had stared on at Pan with curiosity as he was sure there was supposed to be a twin somewhere, Agreus. In mythology, they were depicted as somewhat inseparable. Like an older brother and little brother whose bond was a little too deep, but then again, John just chalked it up for their deep love of keeping the balance of light and dark.