Bellatrix and Hermione have limited interactions in the series. Bellatrix is a Death Eater, and so on the opposing side of the Battle of Hogwarts. Their interactions are antagonistic. Bellatrix despises Hermione for being a muggleborn (or as Bellatrix puts it, 'mudblood'). Alongside the other members of Dumbledore's Army, Hermione battles Bellatrix and the Death Eaters in the Department of Mysteries.
In Harry Potter and the Deathly Hallows, the trio hunt for Voldemort's Horcruxes, but during the hunt are captured by Snatchers and are taken to Malfoy's Manner. The Malfoy family attempt to discern if the identifies of their captures are indeed the trio. As they converse, Bellatrix enters, stares right at Hermione and asks if it is indeed the mudblood. After they confirm their identities, Bellatrix sends Harry and Ron to the cellars as prisoners but keeps Hermione behind to torture. She uses the Cruciatus curse on Hermione, attempting to gain information on Godric Gryffindor's sword and how she attained it. Despite the curse, Hermione managed to lie, and her body is left on the ground (though still alive). Harry and Ron come to her aid, but Bellatrix threatens Hermione with a knife to her throat, and so Harry ceases. She eventually releases Hermione, after a chandelior falls from the roof of the house, and they escape. In the film version of Harry Potter and the Deathly Hallows, Bellatrix carves the word mudblood into Hermione's arm; this does not occur in the books.
Hermione later used a hair from Bellatrix and brewed a Polyjuice potion. This was used so she could sneak into Gringotts, pretending to be Bellatrix. In the Battle of Hogwarts, Bellatrix duelled Hermione, Ginny Weasley, and Luna Lovegood all at once, and was an equal match. Hermione duelled with Bellatrix's own wand. It is unknown if Hermione kept the wand after the Battle of Hogwarts, though this is likely due to her disdain of the original owner. Bellatrix died during the Battle and was killed after a curse from Molly Weasley.
Bellamione is a small ship (and somewhat a rarepair), but it still has a decent amount of popularity, and is one of the more well-known femslash pairings in the Harry Potter fandom. It is an enemyslash pairing, since Bellatrix is an antagonist and therefore an enemy to Hermione. Hence, fanfics of Bellamione are often darker, often having both Hermione and Bellatrix as villains, or instead a redemption arc for Bellatrix. Fans of Bellamioine often cite parallels between the two characters. Both women are highly intelligent and driven, and both loyal to a male leader. Some view Bellatrix as a darker counterpart to Hermione.
It is also a controversial ship, since canonically Bellatrix tortues and abuses Hermione, and some fans dislike the romanticising and abuse of their relationship.
As of August 2020, it is the most popular ship on Archive of Our Own for Bellatrix Lestrange with over 800 fics. It is the second most popular femlash pairing for Hermione; the first being Hermione/Pansy. It is argubably one of the most popular Bellatrix ships in the entire franchise (the other being the canonical Bellatrix/Voldemort ship, otherwise known as Bellamort).
|SHIPS||femslash||Bellamione • Linny • Parkwood • TNT|
|slash||Deamus • Drarry • Flintwood • Grindeldore|
Scorbus • Starbucks • Tomarry • Wolfstar
|friendships||Golden Trio • Marauders|
|het||Bellamort • Billdora • Bleur • Charry • Chedric • Dramione • Drastoria • Druna • Fremione • Georgelina • Harmony • Hinny • Huna • Jakweenie • Jily • Lovander • Marthur • Nadence • Nevannah • Newta • Newtina • Nuna • Perdrey • Ravender • Red Moon • Remadora • Romione • Snily • Tedoire • Tedromeda • Theta|
|non-binary||Barnaby x MC • Bill x MC • Charlie x MC • Chiara x MC|
Felix x MC • Penny x MC • Rowan x MC • Talbott x MC
|family||Black Sisters • Severitus • Weasley Family|
|CHARACTERS||m/f||Harry Potter • Hermione Granger • Jacob's sibling|