[Flere821]

Originally Posted by Aphrah

I doubt it, as Kirito invented Star Burst Stream in SAO. Why would he teach it to someone? If the author just admits that the worlds are related/the same, then it'll make a lot more sense..

My thoughts:

Spoiler for SAO Vol10 spoilers + WMG:

Considering the Underworld, the possible precursor to AW (ie, FluctLight connection) is based off The Seed, which in turn was from SAO... it could just be Sword Skills are in some shape or form still in AW, and Graphite Edge got his hands on the Two Sword style.

Or Graphite Edge is a FluctLight copy of Kirito in BrainBurst, like how Chrome Falcon and Saffron Blossom have their minds in AW despite no longer a Burst Linker (which also might explain the older brother part of 'Ash Roller'). Though this assumes the program 'BrainBurst2039', and the other models 'AccelAssault2038' and 'CosmosCorrupt2040' are also government experiments like Project Alicization. Graphite Edge would basically be something like the Cardinal System of SAO, a avatar of the system but hangs out with a legion for fun.