Oh hey, this thread exists!
Since Continuum Swords have come up in Pursuit Through the Pleiades, I figured I would talk through some of my ideas I’ve had on the topic.
First we’ve got Sablestar/Ambra Nerach’s sword. An elegant weapon that can slip through her enemies’ defenses. Sword style-wise, I see her with a one-handed style almost like epee/rapier fighting. Bait her enemies into making the first move and then punish their openings. Add to that her mastery of the sword’s abilities, it makes for a deadly weapon for a deadly foe.
Next is Peri’s sword. While not terribly functionally different from Ambra’s, I designed it to have a bit more personality to it with the star bursts trailing from the pommel like a Kingdom Hearts Keyblade’s keychain. Style-wise, I would put her as “functional.” Based on the Phase Two/Phase Three stories, Jordan’s let her shard do the driving on the sword fighting and has emulated that after she was cut off, so while she has some surprises she’s not doing anything fancy.
Finally we have Adam’s sword (formerly Sablestar of the Future’s). He doesn’t have a Shard to handle how to manage/power the sword, so his is dangerous. He’s not giving it the right amount of power, he’s not giving it the right kind of power, this things sparks and is probably a hazard to anyone around Concord. On top of that, Concord likely wields this thing like an anime protagonist: no skill, just force. While that means that he can overwhelm lesser foes, it makes him predictable to someone with actual skill. Even Will with his superheavy Excalibur probably shakes his head at this boy whenever he draw this sword.