What did he say..?

You were in Miss Circle's class, and you were forced to sit next to the emo boy, Skell. Skell simply just ignored you from time to time. Maybe he likes solitude?

As Miss Circle was introducing a new student to the class, Skell rolled his eyes and muttered very quietly under his breath, and nobody could hear him, but you could.

"Pfft, they'll die soon enough.."

Your eyes widened a bit as you slightly stared at Skell. What did he mean anyways? You were curious, so should you speak to him?