One common theme is family loyalty and betrayal. Since they come from the Black family, their actions towards each other and the family are often explored. For example, Sirius leaving the family while Regulus had a different path within it.
One popular Sirius x Regulus fanfiction is 'The Brothers Black' which delves deep into their complex relationship. It shows how Sirius's choices affected Regulus and vice versa. The story is full of emotional moments and great character development.
There's a fanfiction called 'Regulus's Redemption'. In this, it focuses on Regulus's journey after he realizes the true nature of the Death Eaters. It also weaves in Sirius's attempts to save his brother, despite their estrangement. It's a great read as it shows the complex emotions between the two brothers.
Fanfiction about these three can take many forms. For example, there could be time - travel fics where Harry goes back in time and meets Regulus and Sirius when they were younger. This could lead to all sorts of interesting plot twists, like Harry trying to prevent Regulus from joining the Death Eaters in the first place. Or it could be a fic where Sirius survives and he and Harry explore the secrets of the Black family together, including things that Regulus left behind. There are also fics that focus on the emotional bonds between the characters, showing how the different personalities of Regulus, Sirius, and Harry interact and influence each other.
The themes often revolve around the idea of secrets. Regulus may be hiding secrets from Sirius, which ultimately lead to his departure. This can create a sense of mystery and suspense in the fanfiction. Another theme is the power of choice. Regulus makes a choice to leave, and this choice has far - reaching consequences for both him and Sirius. It can also explore the theme of redemption. If Regulus has made some wrong choices, his leaving could be a step towards redeeming himself, either in his own eyes or in Sirius's eyes. Additionally, the theme of the impact of the wizarding war on personal relationships is quite common, as their situation may be a microcosm of the larger conflicts and divisions in the wizarding world.
Well, it's popular mainly due to the characters involved. Sirius and Regulus are both interesting characters from the Harry Potter universe. The concept of Sirius adopting Regulus creates a lot of drama and emotion. It's a chance to explore what could have been if things were different in their family. There are so many possibilities for plot twists and character interactions in this scenario, which draws in a lot of readers.
One common theme is family loyalty. Sirius is driven by his love for his brother and his sense of family duty to save Regulus. It shows that no matter how estranged they may seem, family bonds are strong.
They could interact with a sense of newfound peace. Sirius might be the first to approach Regulus with open arms, ready to forgive all the past. And Regulus would be a bit more reserved at first but then slowly warm up. They might sit together in a beautiful, otherworldly garden and just talk for hours, catching up on everything that happened since they were last together.
One great Sirius and Regulus Black lemon fanfiction is 'The Black Brothers' Bond' on Fanfiction.net. It really delves into their complex relationship in a unique way within the context of the lemon genre.
One popular 'Regulus Leaves with Sirius' fanfiction is 'The Departure's Echo'. It beautifully portrays their relationship and the emotional turmoil of Regulus leaving. Another good one might be 'Farewell in the Shadows' which delves deep into the reasons behind Regulus's decision and how Sirius reacts to it. You can often find these on major fanfiction platforms like Archive of Our Own.