It's a knife! If he sent a drawing of a knife to someone he would absolutely mean it to imply that the recipient is going to find a knife between their ribs in the near future! That is telling!

So naturally he is going to lock onto the most likely culprit trying to hide behind her book with preemptively malevolent intent and a flaring crest that says target acquired. If she's a would-be assassin she's doing a poor job of it, clearly acting suspicious and the color is hard to miss, too. Different from the rest of the overgrown monkeys, but then, peacocks aren't meant to be the color of frost and death and yet here he is. Perhaps that means she is more than she appears too, hardened by life as an outcast, lethal and calculating and ambitious--

The small wave throws him off. He stares at her, slightly stunned, which gives her plenty of time to write and send over another note. Almost automatically he snatches it out of the air to read it, and its contents leave him more bewildered than ever. This time it isn't a threat so much as a... general tip. And an offer? What is he meant to do with this? Respond by flying note??

Well, one- he doesn't have a brush. And two- no!! Gathering composure and determination, he hops off his seat and strides over to the girl with slow, measured steps, making sure the metallic sound of his claw-guards announces his approach. And once in front of her, he pauses, expression coldly polite, and holds out his wing.

"Hand over your chalk."