If Ichigo was able to parry the attacks of Gin, are you telling us that Ulquiorra who has shown to be much quicker than Ichigo can't?Gins sword is quicker than Ulq not him, himself necessarily that we don't know but his sword's extension is too fast.
OT: Gin would win, op don't tell your friend you were wrong he was wrong.
In my opinion it can go both ways with this match-up, however saying that one is definitely going to win is a bit too much. And to be honest, speed in bleach has been so inconsistent that you can't really tell what is quicker.
The retraction of Gin's Kamishini no Yari is supposed to be 500 times the speed of sound. So in one second Gin's bankai can retract a total length of 500*340.29 = 170154 meters per second. Can you tell me how somebody at not even 20 meters away can dodge an attack at that speed?
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