Perhaps there's a prophecy or some sort of ancient warning that Sonic will bring doom, and his friends believe it without really understanding it properly. They might think they're doing the right thing by betraying him to prevent the supposed disaster. Also, a new character could come into the story and turn Sonic's friends against him by spreading lies and half - truths about Sonic's intentions.
One possible reason could be jealousy. Maybe his friends are jealous of Sonic's speed or his heroic status. Another reason might be a misunderstanding. For example, Sonic could be framed for something he didn't do, and his friends believe the false evidence. It could also be due to outside influence, like an enemy manipulating his friends' minds into thinking Sonic is a threat.
In some fanfictions, it could be that Sonic's friends feel overshadowed by him. Sonic is always the center of attention, and they might start to resent that. There could also be a situation where Sonic discovers a new power or ability that his friends fear. They might think he'll become too powerful and turn against them, so they betray him first out of self - defense, in a sense.
If you want the clearest chapter reference, go to Chapter 140. Early on, In the evening, the setting sun was like blood, dyeing the entire earth a...; later, the chapter leans on Although there had been a cool breeze in the mountains in the afternoon,....
Chapter 137 is the strongest chapter-level answer because it starts from Jiang Li personally went to Lai Fu's tomb and performed a small ritual. and follows through on At that moment, Qi Tianyu had just finished his farming tasks, feeling....
The best chapter pointer here is Chapter 121, "Jiang Li Gains 5 Points for His Meritorious Rescue!". It opens with Seeing that Wen Jiaojiao's condition had improved significantly, Director... and closes on You're supposed to be a man who conquers mountains!] Experienced and....
A practical answer is Chapter 132, because it turns the idea into a concrete scene. The chapter opens with The new girl in the live-streaming room went crazy., adds pressure through Stay away from my fragrant and fresh Brother Daniu!] [Not only has the..., and ends on He stir-fried the other.
Look to Chapter 165 for the clearest answer. It begins with How come everyone else got a solid six points, and he ended up with just..., keeps building through Director Sun spread his hands, "Our staff calculated the total score with..., and lands on Various explosive Weibos sprang up like.
The best chapter pointer here is Chapter 165, "Boom! Jiang Yan is actually Su Yinwan's fanboy?!". It opens with How come everyone else got a solid six points, and he ended up with just... and closes on Various explosive Weibos sprang up like mushrooms after the rain, and....
If you want the clearest chapter reference, go to Chapter 121. Early on, Seeing that Wen Jiaojiao's condition had improved significantly, Director...; later, the chapter leans on A doctor, donned in a white coat, hurriedly got out and immediately asked....
Look to Chapter 172 for the clearest answer. It begins with Not only Shu Yan, but the entire internet was shocked when they saw Su..., keeps building through Damn, what brand of make-up is Su Yinwan using?, and lands on Where's the chaotic scene I was anticipating?.
A practical answer is Chapter 158, because it turns the idea into a concrete scene. The chapter opens with Reluctantly, Jiang Yan had no choice but to forcibly join the group for..., adds pressure through Don't make me laugh, Jiang Li looks better even without makeup than she..., and ends on we're.