Kuangxiao is integrating the power of all the Shrines; how strong he will eventually become, no one can predict.
All the participants in the Personality Experiment were personally selected by Fu Sheng, and later, Dream and Gao Xing planned the Blood-colored Night. Kuangxiao was the only child who endured all the pain and despair.
He is the focal point of the Deep World and reality's power struggle, simultaneously possessing the power and expectations of both sides.
Now Twin Flowers bloom, occupying multiple Shrines, wielding the Will of thirty children with special personalities, plus the full assistance from Number Two. Once Kuangxiao becomes Unspeakable, he will undoubtedly be the most unique Unspeakable.
It is also because of Kuangxiao's presence that Han Fei dare leave the Deep World confidently; the two of them will always rely on each other.