Of course he can
The first time she get hit it may not be fatal, but would damage severely, so the better move is retreating, which gets Brook time to prepare the technique again and make being close to him a risky move
Which is a disadvantage, as he can't win against her on range and she heals off the damage. If she plays range he is screwed.
Additionally, he won't even get time to prep, because invisible telekinesis will be hitting him. Just because he can't reach her, doesn't mean she can't reach him.
Also, if this technique is the only thing Brook does, then I don't think he has feats of chaining it together fast enough to deal damage to her quicker than she regens.
(For curiosity, was the bone...ouch)
I don't mean that it's a bone breaking what would happen, i meant to prove that what would happen to her would be way worst.
Those two fighters had the same prep-time, so in this site's terms, we would say they were above baseline and somewhat on a same range, and you saw what happened
The gap between Brook and Sybilla is way bigger than those two mma fighers' gap, so by logic, what would happen is hurting more too.
Well, our one-shot gap is what it is. Unless you plan to change that, Brook won't be able to deal huge damage fast due to real life examples.
Can she TK, heal and throw acid at the same time?
Yes. She has a parallel thinking skill, that helps with multitasking.
It flies around controlled by her and she can shape it into whatever shape she wants. Think water bending in avatar, but with acid and without the need for movements to control it.
Brook seeing the acid coming to him while TK is coming for the arm would throw the arm further away from her (so it escapes her range) and not get hit by the acid, and still apply the above point of getting prep time too.
The "prep" here is just not worth much, because Sibylla is on range. If he makes the move from that distance then, with her speed boosts taken into account, she can make a reaction like putting up an acid barrier to block it. Heck, Sibylla will probably memorize the stance of the technique and take action before he starts.
And once TK has the arm he can't throw it anymore.
IC would she do that? I hope not, pacific route is way cooler here. Acid commented before.
Yes, she would destroy stuff the opponent wields. In fact, weaponized instruments are a thing in her verse. There even is a divine blade that is a harp.
Befriending is way easier than 'fight for me', and even more than 'fight for yourself' (which he does even in the profile). Also, it's not a control, since Brook would IC prefer the aggressor to be his friend, as he's more of a performer, cool guy, that guy who tells funny jokes. Again, I hope he's not getting his violin immediately wrecked, since the pacific solution is way cooler lol
He just doesn't have the feats of doing that do a degree that is applicable to overcome SBA mindset. Much less against some elite fighter like Sibylla. Again, he never really does that against enemies in the show. Brook doesn't even have social influencing listed.
Since we voting, I vote Sibylla, obviously.