This is too obvious.
Only one person can bring mental imprisonment and visual burning through eye contact, Little Grape Grep, and now Little Grape has combined with the Yellow Robe to form a humanoid entity.
It possesses the quick movement and concealment of the Yellow Robe, as well as the evil sun burning of Little Grape.
Even now, when Yi Chen looks at it, he can feel the burn from the soul,
but none of this matters, what matters most is Little Grape's abnormal state—those eyes arranged in a smiley face make one suspect Little Grape is affected by the Clown Virus, possibly a whole new form of indoctrination.
If William can't explain this, Yi Chen might really be inclined to kill.
However, on the opposite side of the lake, Little Grape raises its right arm, making a waving gesture goodbye, and that smiley face on its face dissipates, seemingly back to normal.
Before Yi Chen can inquire, Little Grape has disappeared.