Xenophilius Lovegood

Xenophilius "Xeno" Lovegood is Luna Lovegood's father and the editor-in-chief of The Quibbler, a magazine that, according to Luna, publishes "important stories he thinks the public needs to know." The stories are often wild conspiracy theories or research on probably non-existent creatures, but Luna believes them fervently. Xenophilius is described as eccentric looking. He is slightly cross-eyed, with shoulder-length white hair the texture of candyfloss. He is introduced as a friend of the Weasleys in Deathly Hallows, when he attends the wedding of Fleur Delacour and Bill Weasley.
Xenophilius wears the symbol of the Deathly Hallows around his neck as a charm. Later in the story, he explains to Harry, Ron, and Hermione the significance of the Deathly Hallows, which they had previously mistaken to be merely the mark of Grindelwald. Although initially one of the staunchest supporters of the anti-Voldemort movement through his magazine, Xeno later betrays the trio's location to the then-Death Eater-controlled Ministry of Magic in a bid to ensure the safe return of his kidnapped daughter.
In Harry, Ron, and Hermione's ensuing battle with the Death Eaters, the Lovegood house is mostly destroyed, due to a missed Stunning Spell striking the horn of an Erumpent (which Xenophilius wrongly believed to be that of a Crumple-horned Snorkack), and they manage to escape. In the aftermath, the angry Death Eaters arrest Xenophilius, which saves his reputation, as he is mentioned on the clandestine "Potterwatch" radio broadcast as a persecuted anti-Voldemort dissident, and the new issue of "The Quibbler" in which he attacks Harry Potter is buried under the ruins and never distributed. Evidently, Harry, Ron, and Hermione never reveal his attempted betrayal, which was only motivated by fear for his daughter's life.