Without reading the 'the unbreakable bond novel', it's impossible to say for sure. But it might have a male and a female lead whose relationship forms the unbreakable bond. They could be from different backgrounds, like one from a wealthy family and the other from a poor one, and their journey to build and maintain this special bond could be the focus of the story.
I don't know as I haven't read the novel. There could be all kinds of characters, perhaps a young hero and his mentor who have an unbreakable bond.
Since I'm not familiar with the 'the unbreakable bond novel', I can only guess. There might be a group of friends as the main characters. For instance, a group of adventurers who have been through many adventures together. Their shared experiences, trust, and loyalty towards each other create an unbreakable bond among them, and the novel could be centered around their adventures and the growth of their bond.
Chapter 942, "In Which Year Did the River Moon First Shine on People [Extra · River Moon Edition]", is the clearest early answer because it turns River Moon Edition's situation into a concrete plot event. Early on, She never expected Jiang Yan meant this..
Chapter 652, "He's Gu Shengrong's Grandson?!", is the clearest early answer because it turns Yu Li's situation into a concrete plot event. The chapter turns that into something concrete by moving from The propellers lifted off again, and Team Q was already on their way...
Chapter 621, "What Makes You Think I Would Save You?", is the clearest early answer because it turns Sister Li's situation into a concrete plot event. The chapter turns that into something concrete by moving from The two walked for a long time before they reached a point where the...
Chapter 860, "Is your friend feeling unwell?", is the clearest early answer because it turns Fairy Sister's situation into a concrete plot event. The chapter gives readers a real answer by opening on Beside him, Chang Song: "...." At least talk behind people's backs.
Chapter 588, "Looking like this, he must be a male model in a bar!", is the clearest early answer because it turns Sister Bai Lu's situation into a concrete plot event.
Chapter 877, "You Are Not the Real Jiang Li!", is the clearest early answer because it turns Su Yinwan's situation into a concrete plot event. It opens with The Gu Family values their reputation greatly and has a dedicated PR...
Chapter 684, "It doesn't matter if it gets broken, I have the money to fix it.", is the clearest early answer because it turns Yin Le's situation into a concrete plot event. The chapter turns that into something concrete by moving from But Jiang Li had already evolved;
Chapter 654, "Did Everyone in Team Q Go to the ICU?!", is the clearest early answer because it turns Miss Jiang's situation into a concrete plot event. A useful checkpoint is the way the scene starts with All of a sudden, all public opinions burst out.
Chapter 783, "I'll Fight it Out with You Rich People!", is the clearest early answer because the buildup finally cashes out in a real clash. It opens with As soon as Qingyang finished speaking, everyone's mentality in the...
Chapter 728, "Number One in the Joint Exam!", is the clearest early answer because it turns Jiang Cheng's situation into a concrete plot event.