Okay i think keyblades can represent anything.......to realms...to worlds...to ones heart...to ones memory...anything really.But you must have a strong heart
also keychains reprsent keyblades that are connected.....thts why light iis connected to dark and twilight.....just imagine the keyblades of realms (dar,light.twilight) on one keyhain....
Thats why keyblades not of the realms dont have chains they arent connected they can exist with out the other.....but this means they are weaker since they arent connected as like the keyblades of the realms......
also keychains reprsent keyblades that are connected.....thts why light iis connected to dark and twilight.....just imagine the keyblades of realms (dar,light.twilight) on one keyhain....
Thats why keyblades not of the realms dont have chains they arent connected they can exist with out the other.....but this means they are weaker since they arent connected as like the keyblades of the realms......