At first, Cersei would probably be haughty and distrustful of Naruto. After all, he's an unknown entity in her world. But Naruto, being Naruto, would be friendly and try to break the ice. He'd probably talk about his village and his friends back home. Cersei might be intrigued by his strange powers and his different way of looking at things. As time passes, they could develop a sort of begrudging respect for each other.
Naruto would interact with Cersei in a very different way compared to how the people in Westeros do. He would be more open - minded and less judgmental. He might try to cheer Cersei up when she's feeling down, using his positive attitude. Cersei, on the other hand, would be constantly testing Naruto's loyalty. She might try to use him for her own political gains at first, but as she sees his genuine nature, she might start to change her approach towards him. Also, Naruto would have to deal with Cersei's scheming nature, which could lead to some interesting and tense interactions.
Chapter 333, "The Clothing Design Room", is the clearest early answer because it turns Lin Manru's situation into a concrete plot event. The chapter turns that into something concrete by moving from [LOL, the little brother turns out to be socially anxious too, he...
Chapter 501, "This Night, Destined to be Turbulent", is the clearest early answer because it turns Dragon Ridge Island's situation into a concrete plot event. The chapter turns that into something concrete by moving from After settling in, Jiang Mingyu aimlessly strolled the streets.
Chapter 431, "Su Yinwan Is Here Too?!", is the clearest early answer because it turns Wilderness Survival's situation into a concrete plot event. The chapter gives readers a real answer by opening on [Holy shit, why is Su Yinwan on this show too???] [!!!
Chapter 605, "The Plan to Surround and Annihilate Team Q Commences!", is the clearest early answer because it turns Shang Shaojing's situation into a concrete plot event. A useful checkpoint is the way the scene starts with The thirty-odd people lurking by the shore were just like today's...
Chapter 613, "When a Whale Falls, All Life Thrives", is the clearest early answer because it turns Xingmei Entertainment's situation into a concrete plot event. The chapter gives readers a real answer by opening on Hearing He Wen's words, Shen Lan was so excited she nearly sprayed...
Chapter 690, "Miss Jiang, Marry Me!", is the clearest early answer because it turns Wen Jiaojiao's situation into a concrete plot event. The chapter gives readers a real answer by opening on No wonder she had predicted she would come into some unexpected...
Chapter 663, "How Did These Two Start Fighting?!", is the clearest early answer because the buildup finally cashes out in a real clash. A useful checkpoint is the way the scene starts with Jiang Shixu received the message in daylight the next day.
Chapter 459, "Even Got Educated by a Variety Show", is the clearest early answer because it turns Zhuola's situation into a concrete plot event. The chapter gives readers a real answer by opening on Su Yinwan felt somewhat annoyed but could only suppress the emotion...
Chapter 328, "Persuading the Old Master", is the clearest early answer because it turns Qiao Shuang's situation into a concrete plot event. The chapter gives readers a real answer by opening on Jiang Li's authoritative words stunned the old man.
Chapter 426, "How Did Someone Fall Down?!", is the clearest early answer because it turns Do's situation into a concrete plot event. The chapter gives readers a real answer by opening on Isn't this a bit too risky..." Liu Qian, standing out of the camera's...