It's totally his fault. He's not mad at her! He's just mad at the situation and also that someone went into his tent.

This is to say, he blinks a bleary eye open when the amethyst lands next to him. He's not even aware she tried to hit him with it. He's pretty sure she just threw it down to him like a normal person. He grabs the gem and unrolls the chain, pulling it over his head without actually sitting up yet.

"Thank you. Were you able to get away safe?"