[center][b]Potential Keys.[/b][/center]

There are some keys already mentioned, that he may not already have. 

Uthur, a giant orca, that has the ability to control deep waters. He is also a legendary key animal. His key is the High Level version of Swimming Bass, granting him High Level water manipulation. He is a mortal enemy of Pongo, and Koke-Kain.

Koke-Kain, a polar bear, that has the High Level Frost abilities. 

Unnamed Bug Key, which bestows the power to shrug off/shed skin, so to speak, any poison or illness afflicted to the key wielder, once activated. Must have equal amount of charges to the inflicting attack to get rid of it completely. 

Allectus the Owl, which bestows the wisdom key; allowing Kei'taro an easier time determining weaknesses and openings in his opponent.