* The Horcrux: R.A.B.'s actions directly lead to the destruction of Slytherin's locket, one of Voldemort's Horcruxes. He swapped the locket with a fake, which Harry and his friends then destroyed, unknowingly doing R.A.B.'s work.
* The Fake Horcrux: The fake Horcrux, planted by R.A.B. in place of the real one, provided vital information to Harry and his friends. It revealed a crucial piece of Voldemort's plan, namely, the creation of the Horcruxes and their locations.
* Character Development: R.A.B.'s actions show the complexity of the wizarding world and how individuals can change, even those from seemingly rigid families like the Black family. He sacrificed his life and reputation to oppose Voldemort, demonstrating courage and a moral compass that his family lacked.
* Themes of Redemption: R.A.B.'s actions, even in death, highlight the theme of redemption in the series. He redeemed himself for his past mistakes and became a vital figure in the fight against Voldemort.
* Motivation for Harry: R.A.B.'s sacrifice and courage inspire Harry and his friends. It shows them that even those from dark backgrounds can choose good and that hope can exist even in the face of immense evil.
Overall, R.A.B. is a pivotal character in Harry Potter and the Deathly Hallows. His actions are instrumental in moving the plot forward, revealing crucial information about Voldemort's plan, and demonstrating the themes of redemption and hope that run throughout the series.