Spoiler Warning This article contains information that can be considered spoilers if you’ve not read the Deathly Hallows or seen “Fantastic Beasts.”
"One of the very worst acts of evil seen in wizarding history.” That is how a recent feature article released by the Pottermore team describes the event in which Muggle boys attacked Ariana Dumbledore, the younger sister of both Albus and Aberforth Dumbledore. We learn a little about Ariana in the final book of the “Harry Potter” series and the article by Pottermore pretty much reminds us of what we already know. While we learn nothing new about Ariana, the article raises the question of why she’s being brought up at this point in time. Is there the chance we’ll hear about her and learn more of her in one of the “Fantastic Beasts” sequels?
Most of the information that we already know about Ariana Dumbledore comes from Aberforth in the Deathly Hallows. We are told of the attack upon her by three Muggle boys, then the imprisonment of Percival Dumbledore after a revenge attack against the boys. The family then moved to Godric’s Hollow, where Kendra Dumbledore was later accidentally killed by Ariana’s uncontrollable magic.
After the death of his mother, recently graduated Albus Dumbledore took care of his sister in Godric’s Hollow while insisting that Aberforth continue his own education. Soon, Albus Dumbledore grew weary of being stuck with Ariana all the time and Gellert Grindelwald entered the scene at about that time. Bathilda Bagshot, Grindelwald’s great-aunt, was housing Grindelwald for the Summer and he and Albus quickly became friends.
Aberforth felt that Ariana was being neglected by Albus because he was giving all his attention to Grindelwald, and so Aberforth began arguing with the two, which turned into the fight that killed Ariana. While we are not entirely sure who cast the curse that killed Ariana, Albus insists that it was Grindelwald.
This is all information that we already know, why publish an entire article dedicated to bringing back painfully sad memories of Ariana? According to a Hypable article written by Andrew Sims, “the fandom has been theorizing over the Obscurus/Obscurial.” This type of magic is a new concept brought forth in the new “Fantastic Beasts” film. According to Newt Scamander, an Obscurus is “the unused energy within a young witch or wizard who suppresses their magic, creating an unstable, uncontrollable, dark force within the child.”
In the “Fantastic Beasts” film, we get to see the appearance of an Obscurus in New York City. According to Andrew Sims, many fans are wondering whether or not Ariana Dumbledore was an Obscurus. We know that Grindelwald is in the “Fantastic Beasts” movies - seen in the recently released first movie - and that a young Dumbledore will be appearing, as announced, in the next movie. Knowing this, we could learn more about Ariana since her death could be one of the many reasons Albus has to hunt down and defeat Grindelwald.
If you want to read the Pottermore release, you can find it here.