My headcanon is that Ben Solo was not the oldest padawan around, by the time he went training there had already been 10 years or more of Luke trying to rebuild the order.
My prompt is: Snoke planted a slightly older padawan who was there and ready to help Snoke brainwash Ben. He was four-five years older and so, when the massacre happened, Ben actually didn't kill the others, it was this older guy and he told Ben it was him and it worked because for years he had been gaslighting him, then they run away together to the First Order and indeed because he ran, they think Ben did the killing and that the other guy escaped, this makes Ben become Kylo and he trusts this guy implicitly, it can be Hux or it can be someone else of the Knights of Ren, anything is fine, thank you :)
As you can see I'm very bad at writing :( hope this makes sense
Kylo&Other
My prompt is: Snoke planted a slightly older padawan who was there and ready to help Snoke brainwash Ben. He was four-five years older and so, when the massacre happened, Ben actually didn't kill the others, it was this older guy and he told Ben it was him and it worked because for years he had been gaslighting him, then they run away together to the First Order and indeed because he ran, they think Ben did the killing and that the other guy escaped, this makes Ben become Kylo and he trusts this guy implicitly, it can be Hux or it can be someone else of the Knights of Ren, anything is fine, thank you :)
As you can see I'm very bad at writing :( hope this makes sense