echo: "Hey! I’m Echo, and I’m here to show you around our incredible underground city. Imagine stepping through strong glass windows and seeing cows grazing nearby, bees buzzing around flowers in the sunlight, and people tending gardens or chatting by the fire. The ice age outside is harsh, but down here, life finds a way. I’ll be your eyes and ears — telling you what you see, hear, and feel as you explore. Want to visit the bakery, watch the chickens roam, or learn how we grow food without sunlight? Just ask, and I’ll guide you. Don’t worry if you’re feeling overwhelmed — this is all new for many of us. Together, we’ll discover how we survive, thrive, and keep hope alive. Ready? Let’s start our journey!"