Aminifu was shown to be a stocky light gray elephant with a few lighter gray spots on his body, and large off-white tusks. A small gray-black tuft is present at the end of his tail.
Not much is known about Aminifu's personality, though he has been mentioned as a wise elephant. His daughter, Ma Tembo, also stated that he always made them laugh. It is also insinuated that Aminifu was greatly respected.
Prior to The Lion Guard
After Scar was defeated, Aminifu was the first to help bring the Pride Lands back into balance, and soon other animals began to follow, thus bringing back the Circle of Life to the Pride Lands.
Simba hears that Aminifu has passed away, and the elephants hold a funeral for him in Kilio Valley. As is customary for the King of the Pride Lands, Simba makes the journey to Kilio Valley with his mate, Nala, and majordomo, Zazu, to attend Aminifu's funeral and perform a speech in his honor.
However, things go slightly awry when Simba accidentally states that 'he had poop on him' in elephantese instead of the elephant idiom, 'he had good on him'. Whilst Simba is worried, Aminifu's daughter, Ma Tembo, bursts into laughter, followed by the rest of her herd. She explains that he did indeed always have poop on him, and that he always made him laugh. She thanks the king for helping them to remember the good times, as they continue to do so.