"I like your hair," I commented. She looked beautiful even with Hello Kitty stickers stuck on her hair and cheeks and even her forehead and arms.

"Thank you."

"Why does it change color, though?"

"I don't know, it just shows my emotions."

"Oh."

"Mm-hm."

"But why is it purple when you're smiling right now? Are you sad? Are you faking that smile?"

She stopped before turning to me with an unfathomable expression on her face.

"What?"

"It's yellow."

"Oh. It's yellow?"

"Well, now it's not," the tips of her hair suddenly changed to green, "now it's blue."