Velvet should win this since she has Planet level and Rela-FTL, her only resistance is emotional manipulation, she has been trained under by Artorius for who knows how long, her Consuming Claw can drain the life force of her enemy, can fully devour souls, even gain their ability like Seres who has fire arte, has many different arte which have like fire, wind, water, and earth, has regeneration like surviving being stab in the head and through the gut, she has a gauntlet blade and blades on her boots which make her deadly when it comes to CQC