tbh im psure most jojo chars can willpower through the Spiral's power?
Shuichi is mentally a wreck from like the near beginning of the series, especially after his mothers death, and yet he never falls into the Spiral's madness till the end, him living outside of the town, does have something to do with it but even once he's trapped in the town he doesn't show any effects to the spiral compulsion till the end.
Kirie is similar with how even undergoing multiple traumatic events and even being effected by the spiral (the hair chapter) its only till the end she falls under its compulsion.