Subtle Warning

"What's wrong?" Reign asked, curious by her statement. 

He had been observing Angela from the very moment she showed herself but hadn't noticed anything out of the ordinary aside from the charming effect of the song that was mostly harmless to humans. 

"I could see parts of their souls leaving their body" Aiku responded.

"Soul?" Reign asked. 

It was the first time he had heard that she could see souls. 

After thinking about it, she was a ghost to begin with, so it wasn't far-fetched that she also had an ability akin to his Undead Eye but with a different spectrum. 

He had an urge to devour her and see if he could gain another eye-based ability, but after weighing her usefulness, he decided to spare her.

The ability to possess bodies was too useful, and he didn't know if he could even get that ability if he eat her, considering that her real body was ethereal in nature.