Basically the backstory here is that this ENA world is cursed by a glitch plague. It destroy or mutate everyone. Even some terrains are glitched in a way that they are impassable, looking like a really bad GPU fail.

The curse caused this ENA to fracture into two.

One side is violent, impulsive and lacks empathy. The other side is mute (she can only use hand signs or the lcd screen to speak). She is quiet, compassive, acting at times as a sister or a mother of the other half.

Even when the violent side lacks empathy, she always check her sister about if what she is about to do is right.

They travel this cursed land together, seeking for a cure (maybe the gods are dead or sleeping) .

The violent one is called EN/ and the quiet one /NA. Obviously EN/ is the one that fights, using her mutated arm as a weapon. That thing causes everything in contact to start glitching and can pierce everything.

The other reason they travel together is that if /NA is not there, EN/ glitching become monstrous.

Many inhabitants will try to destroy them because they are glitched. And many glitched monsters will try too. BTW, the cursed land is all black and white. No more color.

Probably some Taski creature tried to grab some food and EN/ was ready to crush her until her sister stopped her. Maybe she will be a companion.