Madi noticed that, and felt kind of bad for ignoring the first person to come up to her, so she decided to kill two birds with one stone. She reached out towards Aspira as the girl left the shadow of the rock, then slowly turned grey until she looked like a shadow, and sort of whisked her way into Aspira's shadow, completely invisible.
((I think Aspira should be able to feel her in the shadow, kind of like a continuous little tug at her ankles or something. Sorry if this is GMing!))