She's obviously a succubus/demon from an anime. Funny thing … The Japanese are not nearly as caught up on the whole arbitrary concept of good/evil by affiliation, and so they often depict stories in a much more dynamic way than: "demon evil." Try The Devil is a Part Timer or Tales of Berseria.
Tales of Berseria is a game… But I would actually argue that they have things more accurately depicted. Demons are beings ruled by emotions, typically with self-centered goals and a lack of consideration for others. The Abbey - that is the church - is bent on awakening a sealed god and is a sort of paradox. While supposedly representing order, they ultimately are in pursuit of the destruction of humanity. The Church - Catholicism, specifically, which was constructed to worship and resurrect Lucifer.
You can find this as relatively common - Blue Exorcist also takes a similar approach where "good" is often just as, if not more evil than the demons as it hides its true intent and nature.
Hence why I warn: fire is still just a fire, and some light exists to create contrast, rather than true illumination.
Western civilization has largely been shaped by the laws and customs of the Pharisees and the Babylonian kings. These views are a distorted take on "good and evil" created out of the concept of law and fealty. "Good" are the things which serve the function of a state. "Evil" are things which are typically destructive to a state. Due to this logic, the reduction of people to resources in service to the state is the natural "coming of order" - it is the elimination of all personal existence and full incorporation of the individual into the collective which serves the state.
In a literal and metaphorical sense, this is the very process by which Lucifer is to be resurrected and we are all to "return to God."
This is not to say that demons have suddenly become "good" - but that the development of external order, as opposed to internal order, is the goal of those who see themselves as being that external order and purpose. They represent the king Nebachudnezzar (or however that is spelled) - the one associated with the Morning Star - Venus, the Light Bearer, translated as "Lucifer"… Reflecting an even older order of Zoroastrian beliefs that took symbolism from the bright star in the sky (actually the planet venus), which would follow a flower-petal pattern in the sky, notated as the Pentagram.
Thus, while the king may have been associated with such a bright star by his contemporaries, those who would worship the kings are fundamentally different from those who would take inspiration from a star, and always find themselves at odds with the use of the symbolism by the state.
Symbols, alone, are not sufficient to identify a person's allegiance. There are those wearing the pentagram who cast curses. There are others who wear the pentagram who would never do such a thing. Just as there are those who wear the cross who look to crucify you in the end.
Their need for symbolism will be their downfall. They need to be associated with concepts greater than themselves in order to hold power.