I Hope Its Revealed Soon - Tumblr Posts
Theory: Who was conspiring with Nick?
In season 2 of the All Saints Street donghua Nick's goal is to take the Demon King's powers from Neil. His first attempt by making a deal with Demon King directly fails (S2E02) and he would later get a call from a shadow figure (S02E04). That is how we learn that he was not working alone; someone was helping him find a method to absorb the Demon King's power.
As of now (Season 4) nothing has been revealed about this figure even if they still appear in the opening and Nick has turned 'good'. Because the Demong King story line is wholly original to the adaptation, there is no hint as to who this person might be in the manhua either. That can't stop me from speculating. I have three theories right now as it who could it be. Spoilers for two yet to be introduced manghua characters.
First Suspect: Will Bovil
First, I'll start with my least likely suspect. Will was introduced in Chapter 386; his black horns indicate that he is from a noble lineage of demons. He is very powerful, probably the most powerful out of all the demons in the series right now. He and his family could easily be rewritten to be connected to the Demon King (who coincidentally has a black color scheme) in the adaptation.
Outside of this tenuous connection there is also the note that Nick receives being written in ochre yellow. The eye color in the official illustrations is flexible. Most of the time all demons will have a yellow eye color, but in the most recent 7th anniversary illustration Will and his brother have the most intense yellow shade eye color that matches with the note. An even weaker connection is that the scheme for the clubs line (The one with Will as king) in the 6th anniversary deck is yellow, admittedly for the 7th anniversary the color scheme is now purple.
The weakest point of this theory is that none of the actions taken by the shadow figure fit Will's apathetic character at all. He isn't one to seek power, or anything outside of being with Sasha really. It would be too OOC and while the adaptation has significantly changed some characters (Damao being the biggest example) I think it could be a step too far to make Will a villain.
Second Suspect: Witt 'Iron Fang'
Iron Fang is a commoner vampire introduced in Chapter 412. He befriends Lynn online to scam him, but Ira stops him and turns him in to the police because Iron Fang is an international smuggler. Iron Fang is the closest that we have to a straight up 'bad guy' in 1031 WSJ. One of the most recent fantasy AU comics (Ch 780) makes him a confidant that betrayed the king Lynn to usurp his throne. If anyone could be a villain in the adaptation is him.
As he is a smuggler it would also explain how he got the book and later on the 'wand' to extract the Demon King's powers. Iron Fang also displayed a disdain towards angels, giving him a motive for why he would want to awaken the Demon King: destroy the current peace between evil beings and angels.
The biggest point against it being Iron fang, is that he was introduced too close to when the anime was being released. March/April 2020 was the first strip where he appears. Season 1 was released in April 2020 with season 2 releasing in October, but obviously the donghua was being worked on way before that. However, Iron Fang could easily retroactively be made to be this shadowy figure even if back then they had no idea who this character would be. Which leads me to...
Third Suspect: New character
The dongua has created a few, admittedly nameless, characters. Mostly the supernatural league leaders are all original and of course the Demon King himself. I can see out suspect being a new character, maybe someone to contrast with the Demon King. Previously I was rambling about the demons' yellow eye color matching a note, but you know what group is also associated with yellow/gold?
I think an angel villain would be an interesting twist, but I'm just a humble reader and this is just my opinion. Right now, anything is possible, and I trust the team behind the adaptation to cook up something good.
Thanks for reading my insane ramblings and if all my theorizing turns out to be MatPat levels of wrong you are free to make fun of me for like a month.