Fanatical Death Eater and Voldemort's most loyal servant, wielding dark magic ruthlessly.
The sisters jointly pursue Snape for a binding promise.
Bellatrix accompanies Narcissa when they seek out Severus Snape over Draco's secret mission.
She is a family member involved in Draco's dangerous assignment.
Bellatrix travels with Narcissa to address the mission assigned to Draco and later enters Hogwarts with the attacking forces.
Bellatrix questions Snape's loyalties while he presents a secret-agent explanation.
Snape claims to Bellatrix that he is acting as a spy within the Order of the Phoenix before making the Unbreakable Vow.
They cooperate in major attacks supporting the dark faction.
Bellatrix and Greyback attack and destroy the Burrow, and later enter Hogwarts with the other attacking forces.
Explore the full interactive character relationship map of Harry Potter and the Half-Blood Prince
Related entry on Wikidata (Q1057918), public domain (CC0).