Sensing the similarity between my ability and her soul lock, I asked mother in curiosity.
"Mom, when you locked his soul, did you see his body in a grey colour?"
"Yes. Could you also see that, darling~?"
"Yes, when I switched to 'Colour Feel', uh… the name seems a little childish. Let's call it 'Soul Scan' from now onwards. Yes, when I soul-scanned Void-13, I could feel his body only in a grey colour and felt he lacked the desire to live. Also, mother, I saw your lock in the form of golden shackles."
Mother rubbed her robes and ruminated for a while before giving her opinion.
"Hmm, it's an interesting observation. We could try with other people and get more information about your ability."
(Then, I will keep my enemies alive and ask mother to try soul-lock on them. Hmm… I can also test my poisons on them. It's better to use them as guinea pigs for my experiments than kill them easily.)