🚨THEORY FOR INTRUDER🚨
As of chapter 21, there has been the theory that all of the recent events have been an illusion by the fluffy wuffy angels group. And I would like to give my own contribution as I haven't seen anyone mention this (at least from what I've seen so far)
How does the Intruder know about Yuki? She has never been involved with the Intruder at all as far as we know, only knowing about his existence. If so, how was he able to disguise himself as her and ambush Kokudo and Hitsujiya. Plus, it seems the angels conviently appeared just in time in super hero fashion. Perhaps their sensory powers let them detect evil/dangerous anomalies?
Of course, on the other hand, the Intruder has mentioned in that scene that he was now "implanted" in Hitsujiya's mind. If he is real and not an illusion (even though all we know so far is that he can hijack and manipulate lucid dreams) , and what he's saying is legit, then he would probably have access to Hitsujiya's mind and memory and know of Yuki. And this is plausible as we know that Kokudo has probably seen the Intruder as that watchmen in the park, so him being real and able to manifest himself outside of dreams is not impossible. And perhaps he managed to implant himself in Hitsujiyas mind when they were doing that ritual with the balloon.
But then, why pick Yuki? If he was in Hitsujiya's mind, he would know that he trusts the Angels more, and disguising as them would be a better choice for manipulating and toying with him which we know the Intruder loves to do. Then again there is still the possibility that he's not one of those intelligent master manipulator archetypes.
Also, why attack him at that time irl instead of just hijacking his dreams again? Is he scared he'll lose to the Shepherd of the Jet-Black Darkness and Light Makoto again lol? Trying a different strategy perhaps?
And we can't forget that when they first met the angels group at the crochet club thing, there was a bit where they suddenly were having a fancy tea party in fancy dresses. Perhaps this alluded to them having some sort of illusion/hallucination ability imo.
But then here's the question: How would the angels group know of the Intruder and make an illusion of him? Is their mind reading that powerful? Have they encountered him before? I'm literally at the edge of my seat waiting for the next chapter.