The Isolator, Vol. 3 (light novel)

Having successfully helped destroy two of the evil Ruby Eyes, Minoru, the Isolator, is recruited by the Syndicate, a secret organization dedicated to their eradication. He teams up with Suu Komura, the Refractor, a young girl said to be the Syndicate's most powerful member, to attack a secret stronghold of the Ruby Eyes. Their target is the most fearsome opponent they've ever faced: the Liquidizer, but their enemy is not what they expected...