Actually... Had she sensed Koishi's approach? Or had she just heard it?

The girl had green hair and large eyes that glowed with an inner light. A third eye, quite literally, bobbed in front of her chest at about heart level. It was a deep blue in color and closed. It was attached by two fleshy cords, extending from either side winding loosely around her body, and attaching at her ankles. They, like the eye, seemed to float of their own accord.

"I didn't mean to fall on you. Sometimes I don't notice things because my head is all around and slantways since it broke awhile ago." There was something extremely unusual about her...

Koishi's eyes brightened as she was offered the nebula, the cord above her left shoulder twisting into a heart-shape. "Really!? Thank you Miss!"

She reached out eagerly to accept it. "Wow! This is amazing Miss! Thank you so much!" When Koishi reached forward, the closeness clarifying the odd sensation. The girl was blank. Psychically non-existent. Her mind could not be read, her presence could not be sensed... It was like she didn't exist. And yet here she was!

This strange void-like presence wasn't really painful for other psychics to be around, but it certainly was uncomfortable.