Ponysona

The 'persona' of an artist-- A persona, in the word's everyday usage, is a social role or a character played by an actor. The word is derived from Latin, where it originally referred to a theatrical mask

An anthro pony or 'furry' is an anthropomorphic animal-- that is, an animal that has human traits, or a human that has animal traits (ears, tail, fur, etc.)

A pony sona is the artist's representation of themselves as a pony,but doesn't always have to look like the person;more or less the pony sona is how they see themselves.