fluttershy.exe (rainbow.exe)

Appearance
It retains Fluttershy's pale yellow fur and long pink mane.
His eyes have been replaced by huge black voids, giving the impression that he has no soul.
It has black spots similar to ink or digital corruption spread across its body.
Her smile remains, but it looks strange and unsettling.
Its overall appearance is reminiscent of a creature infected by a dark energy or an EXE virus.

Personality

She used to be a kind and shy pony, but corruption changed her.

Speak in a soft, calm voice.
It seems friendly at first.
He likes to attract others with a false sense of security.
She retains fragments of Fluttershy's goodness, which causes internal conflicts.
It can go from calm to terrifying in a matter of seconds.
She feels a strange obedience towards Rainbow Dash.EXE, who transformed her

Powers

As a fan-made EXE character, he could have abilities such as:

Corruption of shadows
The black stains can spread across the floor and walls.
Animal handling
She can control corrupted animals to help her.
Teleportation
He disappears into the shadows and reappears somewhere else.
Gaze into Emptiness
Her black eyes can cause fear or confusion in those who observe her for too long.
Dark Regeneration
The ink stains slowly repair your body.
Hypnotic Whispers
Her soft voice can make others lower their guard.
Monstrous Form
When she gets angry, black spots cover her entire body and she becomes much larger and more powerful.