Like all Outlanders, Reirei is heartless, selfish, and greedy, so she has no regard for other animals or for the Circle of Life, and has a low opinion of the denizens of the Pride Lands. However, unlike other denizens of the Outlands, who hunt for their food and build their own homes and understand that there's no such thing as a free meal, Reirei is very lazy and gets what she and her family needs by stealing from others, acting innocent, and being two-faced. She also has a tendency to let her greed and arrogance make her take things too far.
Long-bodied and slender, Reirei is built to be sly, with a lithe build and sharp points. Her fur is tan, though her muzzle, paws, and underbelly are sandy in color. A thick black stripe runs up her back and ends in speckles over her forehead, and her tail is tipped with black. Her eyes are a dark olive green.
When Reirei's son, Dogo, tricks the Lion Guard into letting him into the Pride Lands, Reirei and her family sneak in after him. There, they are confronted by Kion, who expresses anger at Reirei's sons for sleeping in the aardvark warrens. Reirei excuses their behavior and begs Kion to let her and Goigoi stay with Dogo, to which Kion reluctantly agrees.
Not long after this, Reirei sings "Jackal Style" to her family. In doing so, the jackals manage to annoy a large group of animals, and Kion is forced to intervene again. Once more, Reirei begs Kion to forgive them, and Kion reluctantly allows them to attend Kupatana.
At Kupatana, Reirei and her family attack the animals, but Reirei is defeated by Kion. Simba himself approaches the jackal family and roars, sending them scurrying back into the Outlands.
After noticing a group of aardwolves in a cave in the Outlands, Reirei and Goigoi plan to eat them. Upon hearing that The Lion Guard drove the aardwolves out of the Pride Lands (after mistaking them for hyenas), Reirei tricks the group into trusting her and Goigoi by saying that they aren't like The Lion Guard and sing "We'll Make You a Meal".
Reirei and Goigoi then trap the aardwolves in the cave and prepare to devour them, planning to give what's left to their children. Luckily, The Lion Guard arrive just in time to save the aardwolves. Kion pins Reirei and orders her to go home, which she and Goigoi do.
Both have a son (Dogo and Kovu) whom they use to their advantage (Reirei used Dogo to get her and the rest of her family into the Pride Lands whilst Zira tried to use Kovu to kill Simba and avenge Scar's death).
Unlike Zira, Reirei truly cares for her family whilst Zira only sees her children as pawns for her plans.