Everybody eats. After dinner, the Goblet of Fire begins to spark, and it spits out slips of paper: Fleur Delacour (the Veela girl) is the champion for Beauxbatons; Viktor Krum for Durmstrang; Cedric Diggory for Hogwarts. When all seems finished, the Goblet spits out another name: Harry Potter.
Rowling establishes a pattern regarding wizards' character. Competent wizards are kind, and poor wizards, are defensive, bullying, and distrustful because they are aware that their own deficiencies can and will be revealed when faced with more powerful wizards. Moody and Dumbledore are virtually invincible. They can act kindly without having students take advantage of them, simply because they are so thoroughly watchful and competent; many times Harry has outsmarted Snape, but students almost never outsmart Dumbledore. Similarly, nobody acts up in Moody's class; they all know better than that. Malfoy has always hated and resented Hermione for being a non-pureblood wizard who gets the best grades in the class; Snape resents Harry, who always outsmarts him. Dumbledore never fights to be right, and he is the one whose leadership is always respected instinctively by the students and other teachers. Moody gains instant respect and renown throughout the school, simply because of his experience and ability as a teacher.
Sexual tension, which is not present in the first three Harry Potter books, is prominent in the fourth. Sirius, Dumbledore, and all of the Hogwarts teachers are presumably single—in fact, the only wizard couples we have been made aware of are Harry's late parents, and the Weasleys. One explanation is the English boarding school setting, where the students' lives are the focus, and the teachers' lives and affairs simply set a backdrop that is not to be examined. Another explanation is that relations between the sexes should enter the picture at Harry's current age, and so at this point in the series, they become important to the plot.
Everybody gawks at Krum because of his talent on the Quidditch field. He is quiet and not particularly attractive, but boys congregate around him seeking his friendship, and girls, seeking his autograph. This appearance poses an interesting dilemma for Harry, who for the first time in his life is part of an audience that is reacting to someone else's fame. He and Hermione seem the most levelheaded about Krum's appearance within their midst, as she is too dignified and intelligent to be impressed, and Harry is standing back while Ron fawns over Krum. Harry has gained a experienced deal of unsolicited attention in his life, over his infant defeat of Voldemort; he is used to seeing people stare at his scar and whisper about him behind his back, and here we see the full absurdity of the fame-hungry throngs admiring a hero. It is no surprise that Harry and Krum do not initially pursue each others' friendship, but that they ultimately get along well; they are living in very similar public circumstances. Ron is painted badly in his excitement about Krum. He has always been a deeply loyal friend to Harry, seemingly unconcerned with Harry's status in the wizard world, but in his blind adoration for Krum, as well as his coming anger with Harry for becoming a champion, Ron loses a bit of credibility as an unconditionally supportive friend.