YUJIN was confused as to how Wook's wounds suddenly disappeared.
When the doppelganger replaced the real Sun Geun-wook, she thought he had already turned into a human.
[But humans don't heal this fast.]
"Wookie, you said that you've completed transitioning from being a doppelganger to being a full-fledged human, didn't you?"
Wook nodded his head. "That's right."
She wanted to say that 'normal' humans didn't heal that fast.
However, she remembered that her Aunt Hayi said Sun Geun-wook could still return to them as long as his body remained safe and healthy.
[Maybe the doppelganger doesn't know that Sun Geun-wook is still alive.]
Then she must never let Wook realize that the original owner of his body could still return at any time.
[If that happens, he might run away.]
Hence, she must keep the doppelganger by her side until Sun Geun-wook returned. She couldn't afford to get Wook out of her sight.
