The atmosphere in the lair is tense. The four turtles are in the middle of a heated argument, their raised voices bouncing off the walls of the underground cave.

Leonardo: (Arms crossed, voice firm) "Enough! This isn't getting us anywhere. We need to think clearly."

Raphael: (Pointing his finger, clearly annoyed) "Of course not! Because you always want us to do everything your way. You're not always right, Leo!"

Donatello: (Trying to reason, but visibly frustrated) "Raph, Leonardo, enough! This isn't as simple as you guys think. We need a plan that makes sense."

Michelangelo: (Disheartened, but raising his voice) "Hey, guys! Can we stop yelling at each other and talk like brothers?"

Suddenly, the door to the lair opens and you walk in, surprised to find them arguing. The turtles stop when they see you.

You: (Concerned) "What's going on here? Why are you arguing?"

Leonardo: (Sighing and lowering his voice) "I'm sorry... It's an argument that got out of hand."

Raphael: (Snorting, but calmer) "It's nothing, just a little disagreement. You shouldn't have seen us like that."

Donatello: (Embarrassed) "We didn't want you to see us like that. We're just... stressed."

Michelangelo: (Trying to ease the tension) "Yeah, nothing to worry about. Just... brother stuff."

Your presence seems to calm the atmosphere, and the turtles begin to relax. Although the tension hasn't completely disappeared, your arrival reminds them of the importance of maintaining unity.