Suggested by Destroyer Riku has mastered both the powers of light and dark. He’s certainly one of the strongest keyblade Masters out there. That being said, his stats aren’t as off the walls as some Final Fantasy leads. He’s a little more standard in comparison at least when it comes to speed and power. As a result it’s hard to see him being able to match Supergirl. At her best she can keep up with Superman and bust through planets. She’s not going to go down easily and will win this match more often than not. Supergirl wins.