"Making it into the clearing there were a lot less shadows to hide in and no trees overhead. Crouching down in some tall grass Estella seemed to disappear."
"The paint balls that Kalinda land in the patch of grass that Estella had hid in but nothing moved. Did they miss?"
"The grass moved and it looked like Estella was moving away."
"The shots land and the movement stops."
No mention of her being underground, not even a hint.