So is there real voice chat with Verity?
No — not as an actual Minecraft mod feature. What you're hearing in the videos is a performance: JustWhispy voicing a written character, mixed and edited the same way any scripted video is. There's no confirmed mod that gives an in-game entity a live, reactive AI voice.
Why it sounds so convincing
Good voice acting plus careful sound design is exactly what makes the series effective as horror — the goal is to feel real. That's a storytelling choice, not evidence of an actual AI voice system running in the game.
Want the bigger picture?
This is one small piece of a larger pattern — here's the short answer on whether any of this is a real mod, or go deeper with the full lore explained and who's actually behind it.