Kisana appears as a massive green fish with large fins on it's back, sides and tail. It's covered in smooth scales, and has a large, fanged mouth.
Kisana first appears near the beginning of Episode 1 when Linaly and Hassam take a boat down the river out of town. Hassam complains about Linaly's relationship with Prettz, when Kisana's fin surfaces and swims past. Linaly cheerfully shouts it's name as the monster swims off in the opposite direction.
Kisana does not make another appearance until the end of Episode 2. When Prettz destroys Rouge Island in an attempt at killing Ra Devil's minions, he is shown to have survived and paddles through the water in a large clay pot. Linaly is ecstatic to see he survived and jumps off the deck of Rouge's airship into the water below before beginning to swim towards him. At that moment, Kisana rises from the depths of the ocean underneath Linaly and carries her towards Prettz. The two of them return to the Iron Wing and head off to Tycoon, leaving behind Kisana. It does not make another appearance for the remainder of the story.
- It's unknown exactly what Kisana is nor is its relationship with Linaly expanded upon, however it can be deduced that it's some form of river guardian looking out for her.