One of Nastia AI's most distinctive features is group chat, where multiple AI personas interact with each other and with you simultaneously. You can create up to five AI characters on the Unlimited plan, each with their own personality, backstory, and appearance, then bring them together in a shared conversation. The personas maintain their individual traits even when chatting in a group—a bold, outspoken character will naturally dominate the conversation while a shy, thoughtful one contributes more measured observations. This creates dynamic, unpredictable interactions that feel closer to a real group hangout than a one-on-one exchange. Group chats are excellent for roleplay scenarios, creative storytelling, or simply enjoying the entertainment of watching your AI companions interact with each other. The feature is unique among AI companion platforms and adds a social dimension that single-companion apps cannot replicate.