>>542288501 >>542289352
Meg is Ragna the Bloodedge
You can see parallels to:
Hell's Fang and its combo ender followup (Meg also gets another followup in which she backflips on block and gets to act in the air)
Gauntlet Hades and it's launcher followup
Dead Spike
Several normals that have pretty similar frames

The one observable divergence is Mari's Shark Launcher assist.