"Sure is!" This is said in the most cheerful tone possible, "It's the worst thing that's ever happened! Everyone is dying and the sun has gone out, and there isn't anywhere safe left! But of course, if an undead like me sits around letting herself get sad about it, I'll hollow faster! That's how the curse works, you know."

Chipper here is not being used for its intended purpose. This is the knife-edge of madness and fear, with a smile and teeth. She's cheerful, alright, but only because it's that or death. She's continuing to fight, because it's that or lie down and let the dark take you.

"If I go completely hollow, I'll lose my mind and start trying to kill all my friends. It's happened to almost everyone, so far. So don't talk about it! It's fine. It's normal! Keep walking. Don't worry about it! I don't! I can't. Alright, Cal?"