What's she- is she? That's it. "You can't not know!! You-"

Or, wait, maybe that was an explanation. Just, a brief and vague one, asking for more information from him? He could...

"...I draw Earth." He flips the paper over and draws a crude globe. "I draw Pyay." He adds a- not a stick figure this time, a more detailed rendering. His sense of proportion is all wrong, but it's recognizable.

He hands the paper and pencil to Pyay. "Pyay draw 'tlaa'?"