"That....grim reaper thing just went into my guardian's compartment!" she opened the door and started running when the dementor when inside. Before she even made it to his compartment the dementor flew out of the room with a flash of light, out the back door of the train and out into the early evening air, and just as he did, the lights flickered back on and people once again looked out of their compartments bewildered by the situation.
She ran down to Lupin "Oh my god! Are you ok?" she asked hugging him tightly.
"Yes, we're all for the most part, alright." he said smiling and whispered quietly in her ear to let go, because people beginning to stare.