Roland only marries Anna in the novel. However, the ending has both Anna and Nightingale living with him in his kinda-mandatory seclusion. Given that Anna and Nightingale had some secret agreement beforehand regarding Roland, it can pretty much be implied that they're in a threesome relationship.
Also, this chapter has the biggest change so far from the novel.
Nightingale's kiss in this chapter is a new event for the manhua. In the novel, after Roland and Nightingale's conversation regarding the witches the scene cuts off to a couple of days timeskip involving Petrov. The church meeting only occurs after an interlude chapter with Petrov and his father, thus the novel compresses certain events that take place over a few days into a single afternoon.
I'm hoping this change means that they'll treat BEST GIRL better in the relationship front.
Its a super human solider pill, it makes people super strong, fast and durable. This is how Garcia won the battle at clearwater, becouse she buffed up the sand people with pills
( that and burning the whole city killing everyone traped inside with oil fire that cant be doused with water )
You are likely going to find out in the next few chapter that the downside is that if you dont keep taking the pill you start losing strength until you die from it.
And the number of pills per week goes up and up the more you take it so eventually you die anyway.
So its a suicide wepon but the church dont tell anyone that because they want them all to fight each other to the death so they can swoop in and take over it all afterwards.
They are offering this pill to everyone from graycastle so they all die from the pill or the fighting.