Can we talk about Jesper Fahey unintentionally being one of the most powerful Grisha in the Grishaverse? (Bear with me)
Okay, agreed, Jesper struggles with doing basically anything intentionally. Makes sense - he was never trained.
But if we consider what he can do; controlling the path of bullets. Taking tiny chunks of metal moving at ~120-370 m/s, and directing them. And not just a little bit. He literally managed to make his bullet curve 90° around a right-angle corner. This is a skill we see no other Fabrikator able to do, and you would have thought, if it was a common ability, or even ever seen before, the Darkling or the Triumvirate would have utilised it in the Second Army. They have not. The only people known to use it are Jesper and his mother.
(And let's just give an honourable mention to Aditi Hilli, who could extract poison from the bloodstream of another person. You remember how the tidemakers in the Ice Court needed to be on Parem to mess with a person's blood? But Aditi Hilli? ...I don't want to say no problem, because she did die, but she saved Leoni too, so... half-marks? I'm just saying Jesper has some serious badass genes.)
Actually, talking about the tidemakers on parem, Jesper, with no training and having all the blood in his body sucked out of him, still managed to kill them with dust. A rather dark trick, but one we've never seen David Kostyk, or Leoni Hilli, considered the two most powerful Fabrikators alive during canon, replicate.
But the real reason Jesper is so powerful has very little to do with that, so much as HOW he does it. Every grisha alive used their arms to direct their abilities. After being captured by the Darkling in S&S, Alina has her hands bound, and says something about how she can summon, but not direct light without her hands, so she's basically powerless. It's obviously a common tactic, because the Druskelle do the same thing with Nina and the other Grisha they captured, and only after they get their hands freed on the sharp edge of a broken cup can they use their abilities again.
The only people we see not using their hands for the small science, in fact, are Adrik, who has to relearn his technique after he loses an arm, and, of course, Jesper Fahey, who can direct bullets with his mind - no hand movements required.
If anything, it's probably this ability that makes him so good at directing bullets. After all, at the speed a bullet is going, you don't have time to be waving your hands around to control it. What's especially funny to me is that before Wylan pointed it out, he had no idea he was even doing it. He was using an ability no other Grisha can, and Didn't Know. Can you imagine him mentioning that to Nina... or basically any Second Army Grisha.
("You can control bullets?"
"I'm not sure. I mean, my mother sort of taught me, but also I didn't really realise I was doing it until my boyfriend pointed it out, you know?"
"...YOU WERE ACCIDENTLY CONTROLLING BULLETS?!!!")
This is, of course, all book canon, but somehow the show takes it even further. It hasn't been officially revealed Jesper's Grisha in the show, but there are enough clues - Jesper repairing Kaz's cane, Ivan's cut-off comment after their fight, not to mention the fight itself - that I'm taking it as canon. In this, it is accepted NO ONE can use their grisha abilities, except merzost, without first touching their hands together. Not The Darkling, not Alina, no one. Except, of course, Jesper Fahey, who can shoot his bullets and direct them to the exact same point on a kefta, after deflecting them off random objects first.
Tl;dr: Jesper Fahey is amazing and crazily powerful and should be appreciated.
