Sources vary, mostly Wikipedia, and other top results on google.
She is the mother of Mixcoatl and is particularly associated with the moth Rothschildia orizaba from the family Saturniidae. Some of her associations are birds and fire. However, she primarily appears in the form of the Obsidian Butterfly.
Signora is associated with these down to the species, she wears a black butterfly hairpin instead of her mask in the Arlecchino Animation. Plus when defeated she turns into black butterflies, and has black butterflies in some of her attacks.
She could appear in the form of a beautiful, seductive woman or terrible goddess with a skeletal head and butterfly wings
Powder white face
A beautiful woman? "The Fair Lady" and a monstrous form "Crimson Witch of Flames" that's pretty fitting. and their both very pale
Her dominion extends over realms of death and rebirth
Well why I mentioned this is kinda self explanatory
Itzpapalotl, alongside her Tzitzimimeh companions, adopts the guise of a black butterfly during solar eclipses, using this disguise to consume souls.
This is a bit off a stretch but.... in the CWoF artifacts timepiece it says, "A small vessel containing a high-temperature liquid.It is said to be the molten souls of evil spirits."
"Massive waves swept the land, killing everything as the water flooded the paradise. Itzpapalotl managed to fly just above the flooded landscape while Xociphili failed and unfortunately perished in the flood, never to be found again."
Signora and Rostam sort of Parallel this part
Bearing the heavy grief of losing a lover, Itzpapalotl lost faith in life and happiness. This caused her beautiful wings to wither, and soon, her body started to degenerate and die.
However, she coincidentally strayed into a cave in Tamoanchan called Cuauhnahuac, where the creator of the first man and woman, Ehcatl, lived. He regenerated her body and restored her to life.
However, this time, she became a darkened goddess with a heart full of hatred and aggression. Her existence brought destruction in a terrifying way.
This sounds like the CWoF and her meeting and recruitment with Fatui
The gods were alarmed about what happened and sought to punish Itzpapalotl by sending Chalchiuhtotolin, the god of disease and plague. However, Itzpapalotl’s power was stronger, and she was able to defeat him. Chalchiuhtotolin pled for his life to be spared, but Itzpapalotl still considered him a sacrifice, ripped his heart out, and feasted on him.
Ripping out a god's heart? And what does Gnosis mean? Heart of the God. Who is the only Harbinger to rip out a Gnosis? Signora, and after overpowering him.
cursed her, such that whatever they found in her heart that she considered precious, they took it away. The curse passed through the three heavens, causing it to have strong potency and making Itzpapalotl’s life miserable moving forward.
Who has lost basically everything? Signora has, Rostam, her self, her life, her body, her mind, she grew lonely too(Stated by Arlecchino)
is Itzpapalotl a good or a bad goddess? Because of the tragedy that happened to her. In a way, we can say that Itzpapalotl is not completely evil, but neither is she completely good.
They have Design, Story and Motif Parrlels too many for coincidence.
Whats the point of this post? Ītzpāpālōtl is an Aztec goddess, wich is part of What Natalan is based on, and that Connects her to Natlan. As for a literal connection.... we don't know were she was born, while we assume it was mondstat, we just know she "Lived there".