During the village feast, Rimuru offers to help the Ogres get revenge on the orc army that destroyed their village and killed all but the six of them. After sleeping on it, the Ogre leader agrees that they’ll serve as his subordinates until the orcs are dealt with.
Rimuru then names the six Ogres, but comes to learn that while there are only six of them, they were far more powerful to start then the goblins he named, and he passes out from magicule depletion much faster than expected.
But with their new names the six Ogres evolve into “Kijin”, more human and less wild-looking. Now the posse we see during the end credits is complete, and Rimuru now has some very capable subordinates. Looks like he’ll need them!
Scouts of the Lizardmen who dwell in the marshlands in the center of Jura Forest report back to their chieftain that a massive, 200,000-strong army of orcs is making its way through the forest, no doubt to conquer the territory. The chieftain muses that an Orc Lord must have been born to be able to control an orc army so large.
And now we know what that business with the big-man was all about a couple episodes back: A Demon Lord Army officer named Gelmud named an Orc, resulting in its evolution to Orc Lord. That same Gelmud named Riguru’s big brother, as well as the son of the Lizardmen Chieftain, Sir Gabiru.
Gabiru is sent by his father to seek aid in their defense of Jura from the Orc horde. His loyal retainers convince him that this is the perfect opportunity to prove to his father that he can retire and let him take on the mantle of chieftaindom. Souei, Rimuru’s new Kijin ninja, reports the presence of Lizardmen nearby. These two groups will likely have to come together to overcome the threat of the orc army.