Simbas are a race of cat-like humanoids native to Felonia.  A few communities of Simba settled on other worlds, particularly Chandilar, but most remained on Felonia until their homeworld joined the Kurgan Caliphate, when increasing numbers of Simbas setttled on various worlds of the Caliphate, in order to zealously convert the heathen to the "true" worship of the True God. 

Simbas are covered with yellow or light brown fur, have tails, and the adult males have manes.  Humans have noted that Simbas resemble lions on Earth

In the New Shi'ar Imperium, there always has been one or two Simbas with seats in the Assembly of Alien Races.