Explain the relationship between the characters in the given story. A few embers were still glowing in the fireplace, turning all the armchairs into hunched black shadows. They had almost reached the portrait hole when a voice spoke from the chair nearest them, "I can\'t believe you\'re going to do this, NAME_1." + A lamp flickered on. It was NAME_2, wearing a pink bathrobe and a frown. + @"You!" said NAME_3 furiously. "Go back to bed!" + "I almost told your brother," NAME_4 snapped, "Percy -- he\'s a prefect, he\'d put a stop to this." + NAME_1 couldn\'t believe anyone could be so interfering. + "Come on," he said to NAME_3. He pushed open the portrait of the Fat Lady and climbed through the hole. + NAME_4 wasn\'t going to give up that easily. She followed NAME_3 through the portrait hole, hissing at them like an angry goose. "Don\'t you @care about Gryffindor, do you @only care about yourselves, I don\'t want Slytherin to win the House Cup, and you\'ll lose all the points I got from NAME_5 for knowing about Switching Spells." + "Go away." + "All right, but I warned you, you just remember what I said when you\'re on the train home tomorrow, you\'re so —" + But what they were, they didn\'t find out. NAME_4 had turned to the portrait of the Fat Lady to get back inside and found herself facing an empty painting. The Fat Lady had gone on a nighttime visit and NAME_4 was locked out of Gryffindor Tower. + "Now what am I going to do?" she asked NAME_6. + "That\'s your problem," said NAME_3. "We\'ve got to go, we\'re going to be late." + They hadn\'t even reached the end of the corridor when NAME_4 caught up with them. + "I\'m coming with you," she said. "You are @not." + "D\'you think I\'m going to stand out here and wait for NAME_7 to catch me? If he finds all three of us I\'ll tell him the truth, that I was trying to stop you, and you can back me up." + "You\'ve got some nerve —" said NAME_3 loudly. + "Shut up, both of you!" said NAME_1 sharply. "I heard something." + It was a sort of snuffling. + "NAME_8?" breathed NAME_3, squinting through the dark. + It wasn\'t NAME_8. It was NAME_9. He was curled up on the floor, fast asleep, but jerked suddenly awake as they crept nearer. + "Thank goodness you found me! I\'ve been out here for hours, I couldn\'t remember the new password to get in to bed." + "Keep your voice down, NAME_9. The password\'s ‘Pig snout\' but it won\'t help you now, the Fat Lady\'s gone off somewhere." + "How\'s your arm?" said NAME_1. + "Fine," said NAME_9, showing them. "Mada