She wasn't born "Fantasia Fiasco"
But she doesn't remember her original name
She also didn't realize she could've left the last name blank

 Positivity is running a DnD 5e setting that's set in an alt history 1920s that combines noir era gunplay with strange memetic reality bending powers. As someone who boarded a mysterious nation-boat known as Ark, Fantasia is an aspiring young artist trying to escape the poverty of her home to a new life on board. Upon getting on though, a metacausal mishap caused her to come into contact with an extra-dimensional entity that gives her access to the strange reality bending magic that creates the impossible interior space of the ship in exchange for a gradual transformation into what the strange space itself would deem an "ideal hero." As the randomly generated based off the whims of it's denizens pocket dimension is stabilized by strong feelings of gluttony (it's easy to get it to make food, and it's easy to get people to eat a lot of it when it's avaliable for cheap), that also means growing huge is an inevitability.

She's lost a good bit of her memory from her life before, instead gaining the ability to have her art alter reality. One of her very first creations on board being the papercraft bird she's dubbed Corona who acts as her familiar - he's not... the most helpful, and he certainly seems to have large portions of her memory but coaxing the bird to give up the information is hard as he tends to mostly be a brat instead.

In DnD terms she's an artificer with an artillerist specialization - her little dragon sculpture thing acting as her eldritch cannon. It didn't talk much at first but after getting access to some strange medicine that enhances her abilities (and increases the frequency of her strange visions) it's started to gain the personality of her knight in shining armor. They don't seem particularly smart unfortunately, more responding to her every order with 100% loyalty and now an uncomfortably forward sense of chivalry.

Essentially
She's a 2005 internet sparkle dog artist in the 1920s who just learned about the concept of a tulpa and now is arguing with parts of her own mind as they're expressed as little scrimblos

Super cute art done by  cursoryexploration