Board Thread:Questions and Answers/@comment-38947763-20190921181204/@comment-38952966-20200525015742

We have approximately 0 evidence starting Hermit Purple as anything other than Joseph's Stand. The idea of all Hamon users getting the same Stand just doesn't make any sense. Does that mean Hamon users could get 2 Stands, one to represent Hamon and one that's their "true" Stand? Then why didn't DIO's curse pull out Joseph's true Stand? Or does the Hamon Stand replace their proper Stand? Does that mean if Jotaro learned to use Hamon he'd lose Star Platinum?

There's way too many assumptions involved in that theory to say anything for certain, so Occam's Razor dictates we treat Hermit Purple as Joseph's Stand.

None of the other corpse parts have Stands intrinsic to them, so why would the right eye be different? The corpse parts seem to serve as a crutch until the person can properly wield their Stand. Even Tusk required Johnny to use a corpse part until the Civil War arc. Gyro simply hadn't mastered Scan before he gave up the eye, so he lost it.

Unlike Ball Breaker, the Jojoveller actually lists Ticket To Ride as Lucy's Stand, and not the Stand of some energy or the corpse. She lost it when she lost the corpse parts because she couldn't control it yet, but it's still her Stand.

I suppose a reliance on the Spin doesn't necessarily indicate it as belonging to the Spin, but I still find it odd that no official source (in-universe or out-of-universe) ever lists Ball Breaker as Gyro's Stand. It's always listed as the "power of the steel balls".

I believe it most likely that Scan is Gyro's Stand, and that Ball Breaker is just Scan but powered up by the infinite rotation. I don't believe that Ball Breaker is a natural Stand of Gyro, in the same way that Tusk ACT 4 isn't technically a natural Stand of Johnny, because both require a specific technique in order to summon them. Osiris and Boy II Man can still be physically summoned, even if they require specific tasks in order for the user to use their Stand abilities. That's totally different from how Ball Breaker functions.