continuing from this post. Vergil doesn't wait long, a few hours to the next day, to go see Nero on his own. idk where this would take place exactly, but Vergil would not go anywhere near the population center of Fortuna, not wanting to put Nero on guard like that.
before Nero can get too angry, Vergil starts thanking him, for fixing Yamato, for giving him and Dante another chance with each other*. he tells Nero he owes him a great debt. he also fills him in on the visits and phone calls to Lady and Morrison. Nero did know about Lucia and the cultist visiting bc she called, but it does win Vergil some brownie points for transparency. regardless, Nero is like "great, thanks. fuck off" so Vergil leaves but not before promising to check in soon.
Dante is so upset that Vergil disappeared so soon after they got back. he's livid when Vergil tells him where he went. Nero is so mad at them! he told them to leave him alone! Vergil points out that Nero told Dante to leave him alone. Vergil had stayed quiet and let Dante handle it, as requested. besides this wasn't about the cult shit. Dante still isn't happy, but he cant stop Vergil from trying to have a relationship with his son.
over the next few weeks, Nero and Nico take more hunts on the mainland. things are stable for now with everyone wondering how Dante and Vergil being home changes things. Nero needs an outlet, Nico could really use some new research material, and they're always tight on cash.
Vergil keeps popping in, at first just staying long enough for Nero to kick him out. Nico, however, isn't. she wants to talk to him! this can be his in! he starts visiting when Nero is actively hunting, bringing Nico demon parts and answering her questions. Nero doesn't hunt him down and try to kill him, or at least tell him off, so its probably fine.
he also gets a lot of info on what exactly is going on with Fortuna, between Nero and Kyrie especially. well, at first Nico makes a lot of jokes about cucking Nero. she does eventually explain everything.
eventually he finally decides to confront Nero about it. he is truly impressed by what they've accomplished in such a short time. it was an entirely logical course of action to protect themselves and others. he also admires that Nero acknowledges the limits of his skill and found good partners (Kyrie for actually controlling people and Nico who understands all the research left behind). that's the first time Nero really questions if they're doing the right thing. oh well, they've come to far to turn back now.
*(he is not ever going to actually apologize. he regrets hurting Nero but not what he did, believing he had good reason. he's still trying to block out feeling bad about all those people, despite V's progress with empathy.)