Miasma is the deity of justice and vengeance, she was created after Mia (https://www.furaffinity.net/view/55594694/) was stabbed by a void blade and survived (https://www.furaffinity.net/view/55285111/)
And with her survival of this it created a clone of herself, drawing from the time clone created from the worship of Maria (https://www.furaffinity.net/view/55292263/)
She received godhood, and her soul type was changed to cryptic, bot a result of a void blade, which makes her own blood molten, which she then uses as a weapon, her armor has spikes on the arms and in the area around her back so she can manipulate it to her liking, her eyes are also dangerous to look into, which is why she keeps a blindfold.
After the fight that nearly resulted in her originals death, she went her separate ways on a quest of self discovery, eventually deciding to partially keep the original name, turning her own name into Miasma.