Well, in Sirius Black slave fanfiction, often there is a theme of power dynamics. The idea of Sirius being in a subservient position when he is usually a strong and independent character creates an interesting contrast. Also, themes of friendship and family can be present. His friends might try to rescue him, showing the importance of their bond. And the theme of survival is quite common too. He has to endure the hardships of being a slave and find ways to survive in that harsh environment.
One common theme could be the struggle for freedom. Sirius, being in a'slave' situation in these fanfictions, would likely fight against the constraints placed on him. Another theme might be loyalty. Despite his difficult situation, he may still show loyalty to his friends or certain causes. And there could also be a theme of redemption, where he tries to atone for any past wrongs while in this difficult position.
Common themes in Sirius Black slave fanfiction include resistance. Since Sirius is a strong - willed character in the original series, in these fanfictions he would likely resist the slavery imposed on him. There can also be a theme of identity. He might question who he is when stripped of his freedom and status. Additionally, themes related to love might emerge. It could be a romantic love that gives him the strength to persevere through his slavery, or a platonic love from his friends that helps him hold on to his true self in the face of such oppression.
Chapter 143, "Picking Up a Bargain, Acting Maliciously [Three-in-One Mega Chapter]", is the clearest early answer because it turns Cold Beasts's situation into a concrete plot event. A useful checkpoint is the way the scene starts with The tacit understanding cultivated over a long time allowed everyone... and follows through with As they closed to within a hundred meters of He Meng and his group,....
Chapter 141, "Intermediate Thunder Kui, Second Reshaping Skin [Three in One]", is the clearest early answer because it turns Giant Axe's situation into a concrete plot event. The setup is It's a pity that Xia Hong and the fourteen members of the Hunting..., but the pressure keeps building through No matter how strong the spikes on its back are, it can't turn around....
Chapter 150, "Green Bamboo Fence and Marking Stone, Expanding Territory", is the clearest early answer because it turns Green Bamboo Fence's situation into a concrete plot event. It opens with In the past five days, the leader has used nearly six hundred pounds... and closes on But it was indeed unexpected for him that the Mirror Immortal Camp....
Chapter 178, "Reciprocal Meeting and Big Moves", is the clearest early answer because it turns Xiao Kangcheng's situation into a concrete plot event. It opens with That's true, after all, Xia Chuan was just a passing acquaintance. and closes on The content of the three men's words undoubtedly added to their heavy.... The key payoff is that the chapter closes with Seeing Xiao Kangcheng's cautious inquiry, Xia Chuan sighed internally but quickly put on a smile.
Chapter 108, "Long-tailed Rodent [3-in-1 Mega Chapter]", is the clearest early answer because it turns Luo Yuan's situation into a concrete plot event. Early on, Xia Hong leaped to block on Luo Yuan's left side, only exchanging a.... By the end, Leader, it's trying to run!" Before he could relax for long, Xia Hong....
Chapter 148, "Mysterious Visitor, Deciphering the Cold Resistance Level [Vote for Monthly Pass]", is the clearest early answer because it pushes Xia Hong into a new phase or setting. Early on, After introducing himself, he showed a hint of helplessness, cupped.... By the end, He already knew what I intended to say before I finished speaking!.
Chapter 58, "Giant Wooden Puppet", is the clearest early answer because it turns Luo Ming's situation into a concrete plot event. Early on, In the valley, at some unknown time, a Wooden Puppet Giant towering.... By the end, Xia Hong lifted his head, observing that the crack he had just made.... Inside the broader faction conflict storyline, the chapter closes with "Leader Luo, catch this, it's the last one;
Chapter 181, "What Does Great Xia Want, Liu Dahu's Ambition", is the clearest early answer because it turns Meng Yuan's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Thank you, Lord Xia Chuan!" Upon hearing that Xiao Yuan and his two... and follows through with Who's there!" "Who is it!" Meng Yuan and his two other subordinates....
Chapter 19, "The Battle of the Mane Wolves", is the clearest early answer because the buildup finally cashes out in a real clash. Early on, As the sound of beast hooves arose, Xia Hong and the others hurriedly.... By the end, Green blood oozed from its abdomen, and the Snow Mane steadied.... Inside the broader technology upgrade storyline, it turns battle's growth into a concrete upgrade step and sets up the next payoff in the power growth storyline linked to Frost Wolf.
Chapter 9, "Ice Shuo, Vermilion Frost, Gold Lin", is the clearest early answer because it turns Gold Frost Tree's situation into a concrete plot event. The chapter turns that into something concrete by moving from The Great Xia Camp has finally birthed a new logging-grade combat... to The inner trees were more terrifying, with diameters of five or six....