Ey, awesome! He's all yours!
Quick thing I forget if I mentioned. All the cults main basis's are around the prepartion to combat Sun/any similar entities should they appear, but their teachings are not limited to only the removal of those kinds of evil.
While the scenario must be quite serious to prompt their interference, if it does reach such a level they will lend a hand in fighting whatever 'evils' have currently appeared. (Such as with the Skull spiders/remnant skull villains. While the cults did work to help eradicate them they still would've kept their efforts as hidden as possible.)
Ok so basics for Kipir, his cult is called the Cult of The Tide Dancers, but this can be changed if you'd prefer another/can think up a better.
They're mainly water-based, location-wise. It ranges from a mixture of underwater tunnels/buildings, and a medium-sized or so island in the middle of said watersource (be this lake, ocean, or otherwise is up to you along with the region location).
A number of the tunnels lead to the embankment around their cults location, and end in very well hidden entrances to allow the cultitsts to leave to collect supplies, or return home if they are not permanent residents of the base.
Kipir keeps them hidden by using hisfog ability to create a large dome/cylinder of sorts around the island, and uses his liquid-form to forcibly 'guide' approaching boats out of the islands way once they enter the fogbank.
The area they're located would be semi-well known for its mysterious fog, and the odd turnaround any sailors/boat-users find themselves experiencing within it.
You can add more to these as you wish.
His cult is mainly composed of Ga, and Le-Okotan, but there is a small number of Ko, and a very small mixture of the few adventurous Po, and Onu that know of it.
They are trained in water based combat, and minor-stealth. Both under, surface, and boat. They accomplish this through a mixture of swimming/movement based training, and tech (respirators/limited breathing aparatus, turbines, etc).
They are trained in the usage of spears, tridents, weighted nets, and a form of martial arts/restraint based combat training.
All the cults teach this form of restraint based combat, but each has their own unique 'flare' with it (user dependent), and is generally used only in dealing with infiltrators.