Tsunani is a playful Water-type Creo that assumes everyone loves to get sprayed and squirted as much as it does. As a result, Tsunani does its best to spread the joy around.
Historically, humans attempted to use Tsunani in caravans when crossing the desert before high-speed travel became widely available. Between oases, they relied on Tsunani as their backup water source.
The problem was that Tsunani did not fully understand the concept of conserving water for human use. While they adjusted perfectly to the aridity of the desert and made sure to keep themselves hydrated, they had become so used to expending excess water in fun and games that they often wasted the water that their human companions were relying on.
At least Tsunani helped keep everyone cool with generous sprinklings and occasional showers of water.
Biology
When in the water, Tsunani takes in water through its mouth and sprays it out through its ears. On land, Tsunani's hump serves as a water reservoir that supplies its non-threatening squirting barrages.