>According to Lucario's Pokédex entry in Pokémon Legends: Arceus, aura was named by Professor Laventon.
>Legends: Arceus
>A most gallant-looking creature. It emits energy waves and controls them with precision, using them to sense even faraway beings. I have given the name “aura” to this power.
>The Pokédex entries in Pokémon Legends: Arceus are written by Laventon. Incidentally, he coined the term "scalchop" for Oshawott's signature seashell and the term "aura" for Lucario's signature energy wave control power. Laventon also observed that Unown resemble human writing from other lands, though no one takes him seriously

Aurafags come to daddy, your proud lost art? Is just a random name given by Laventon.

Aurafags are just psychicfags from a different branch