Spoiler!
Sunny gonna be neph shadow slave (the girl you see ahead of him). Remember that if he tell his true name to someone, that person gonna be his owner /master. That's her.
So him walking in her shadow is clearly a way of saying he's her shadow / her slave ☝️🤓
So him walking in her shadow is clearly a way of saying he's her shadow / her slave ☝️🤓