Nefu is a young mandrill with bright colors. His fur is a rich chocolate brown, his underbelly a darker version of that color. His hair appears braided into short stump dreadlocks and is a dark cinnamon color.
Nefu is a rambunctious fellow, perhaps a teenager. He is lazy and snarky, and fascinated by the idea of magic, wanting to learn it, and he admires his uncle. His high interest of magic can, however, become a problem, as he has been shown to wildly mix various chemicals and magical items together, resulting in smaller explosions.
Even so, Nefu learns the hard way how magic is to be respected, not abused and chooses to complete his chores without it.
Nefu is in an episode called "Rafiki's Apprentice" and in a comic called "This Chore's a Bore." In the TV series, he causes chaos when he throws a spell which causes a local forest of fruit-bearing trees to harvest their fruit themselves rather than him having to walk the long way from the forest over to his uncle's storage room. The spell spirals out of control and causes many animals to be accidentally hit with magic spells as he tries to make the trees disappear, eventually ending up with breaking Rafiki's walking stick in two, which angers his uncle. Rafiki does however in the end reveal that the stick was just one of a number of sticks he had in his possession, and Rafiki uses one of his additional sticks to reverse Nefu's original spell. Seeing that Nefu has learned what the consequences of using spells and magic without thinking about what can happen, Rafiki grants Nefu his old, broken stick as a gift. The episode does, however, conclude with Nefu messing up the colors on Rafiki's tree, so he still has a long way to go to reach his uncle's level in magic skills.
In This Chore's a Bore
Nefu is fiddling around with Rafiki's staff until the older mandrill orders him to clean up. The younger mandrill complains he wants to learn magic, real magic, instead of cleaning up Rafiki's Tree, so when his uncle leaves, he simply sweeps everything under the rug convinced he did "good enough." He goes to take a dip into the waterhole but finds it's caked with mud and scolds the monkeys who are supposed to prevent this from happening. While the two argue, the monkeys doing so with extreme apathy, The Hyenas appear. He turns to some cheetahs for help, wondering why they are guarding the perimeter. The cheetahs point out no hyena was bothering them so they were doing a good enough job. Nefu leaves the cheetahs and continues running from Shenzi, Banzai, and Ed.
Nefu returns home, where Rafiki tells him doing a bad job with something small, could mess up something big, and orders to sweep better, however Nefu is still convinced he did good enough.