Kella was a Bajoran card game. Face cards included the Emissary, the Kai, and the Ranjen (named for a Bajoran theologian). Popular combinations of these cards in play included The Answered Question (Kai and Ranjen), The Bearers of Truth (Ranjen and Ranjen), and The Learned Ones (Emissary and Ranjen).

This was a popular game on board the USS Voyager, and was often played by Tuvok. (TTN novel: Synthesis)