One common theme is the struggle between good and evil. Since you have an angel representing good and a devil representing evil, there's often a battle of ideologies. Another theme is redemption. Sometimes the devil character is shown to be redeemable through the influence of the angel.
I'm not sure specifically as I haven't read this exact novel. But generally, it might be about a character who appears to be bad (the devil suit) but has good or angelic qualities inside.
One possible ending is that they find a way to be together. Maybe they create their own realm where they can be free to love without the interference of the angelic or devilish worlds. Another ending could be that they are forced apart. The angel is made to forget the devil and returns to heaven, while the devil sinks back into his dark ways. Or perhaps they sacrifice their love for the greater good. The angel stays in heaven to continue its good deeds, and the devil stays in hell to keep the balance, but they always remember each other in their hearts.
In an 'angel devil love story', the angel, with its golden wings and kind heart, fell in love with the devil who had a dark charm. The devil, though used to a life of chaos, found peace in the angel's presence. However, their love was not easy. The celestial and infernal realms were against it. The angel risked being cast out of heaven, and the devil risked losing his power in hell. But they were determined to fight for their love.
One common theme is the struggle between good and evil. Since angels are often associated with good and devils with evil, their interactions and the choices they make highlight this eternal struggle.
It could end with separation. Their differences may be too great to overcome, and they are forced apart. Maybe the forces of heaven and hell won't allow their union.
One common theme is the struggle between good and evil within the relationship. The devil represents temptation and chaos, while the angel stands for purity and order. Another theme could be redemption, where the devil may be redeemed through the love of the angel.
Since I haven't read it, I can't say for sure. But it might have a protagonist who is the 'angel in the devil suit' and perhaps some supporting characters who either help or hinder this character in their journey.
Another ending could be that they fight against all odds and manage to change the views of both the angelic and demonic realms. They prove that love can exist between the two and are allowed to be together. They then live in a sort of in - between world, a place where good and bad can co - exist in harmony because of their love.
Well, without having read this 'the foolish angel dances with the devil novel', it could be a story where the angel represents purity and the devil represents corruption. The 'foolish' part of the angel might suggest that it doesn't fully understand the danger of interacting with the devil. Maybe it's a love - hate relationship where they dance, which could symbolize a complex interaction between two opposing forces.