I don't think Naruto being secretly emotionless is a common or very believable concept in most fanfictions. Naruto is known for his big heart and strong emotions in the original series. But if in a particular fanfiction he is shown as such, it might be part of a complex plot device. For example, perhaps he has to hide his emotions to protect himself or others. Or it could be a misinterpretation by other characters in the fanfiction who don't understand his true self. However, it still feels a bit out of character considering his established personality in the main Naruto storyline.
Well, it depends on the fanfiction. Some fanfic authors may take a rather unorthodox approach and portray Naruto as secretly emotionless. However, this goes against the canonical Naruto who is full of emotions like determination, friendship, and love. But in the realm of fanfiction, anything can happen. It could be a creative exploration of how Naruto would act if he had some sort of emotional block or had been through some traumatic event that made him seem emotionless on the surface.
A practical answer is Chapter 197, because it turns the idea into a concrete scene. The chapter opens with Seeing that no one cared about what she said, Su Yinwan immediately felt..., adds pressure through Dear brother, you've protected me all this way, why not let you handle..., and ends on Wen.
Chapter 214 is the strongest chapter-level answer because it starts from Director Sun fell silent for a second. and follows through on Even when Wen Jiaojiao fanned Richards' face frantically, he remained....
A practical answer is Chapter 201, because it turns the idea into a concrete scene. The chapter opens with The third time she passed by happened to be when she was rushing back..., adds pressure through Miss Jiang, let's take a selfie together., and ends on Indeed, I'm not well-received." "Ahhhh.
A practical answer is Chapter 205, because it turns the idea into a concrete scene. The chapter opens with Ah Fu had no idea what the video Jiang Li mentioned was., adds pressure through Let's play together from now on., and ends on Having such a sister certainly would bring happiness..
Chapter 227 is the strongest chapter-level answer because it starts from Your Four Pillars of Destiny is very strong, with wealth, authority, and... and follows through on Your three palaces are prosperous, and correspondingly, your marriage....
Chapter 185 is the strongest chapter-level answer because it starts from He was so anxious that he immediately picked up the megaphone. and follows through on The next, she'd complain that the ground was too slippery to walk on..
The best chapter pointer here is Chapter 204, "Establishing Authority". It opens with Su Yinwan didn't move, but Director Qian turned around, ran to the... and closes on Jiang Li immediately met their gaze, her icy and indifferent look....
If you want the clearest chapter reference, go to Chapter 230. Early on, Shang Shaojing's expression wasn't looking too good either.; later, the chapter leans on He had always been the winner in any field, and there had never been an....
Chapter 228 is the strongest chapter-level answer because it starts from Huo Ziyang had not stepped out of the house for a whole week. and follows through on Why did you hit Ziyang?" Huo Xuan, one hand holding a phone and the other....
If you want the clearest chapter reference, go to Chapter 222. Early on, How come they're even live streaming in a reality show?!; later, the chapter leans on LOL, the expressions on these people, each one more skeptical about life....