You need to go learn where demons, devils or evil spirits come from as God did created all the angels to be holy and blameless before Him just as He created man to be holy and blameless before Him. God has never created them evil as I have already shown you, but it's your choice to reject the scriptures I already gave you and to reject the teachings on freewill.
If God created all the angels holy, then this violates the Scripture in Isaiah:
8 I am the LORD: that is my name:
And my glory will I not give to another,
Is 42:8.
Holiness is the Nature of God and He doesn't give His holiness to anyone.
And another Scripture you violate is:
6 That they may know from the rising of the sun, and from the west,
That there is none beside me.
I am the LORD, and there is none else.
7 I form the light, and create darkness:
I make peace, and create evil:
I the LORD do all these things.
Is 45:6–7.
And YOU want to accuse ME of falsehood? I accept His Word on both counts you do not. If the angels were created holy and they sinned, then you believe sin comes from holiness. Here's a question for you, two, actually:
God is Holy. How long before God sin since you say sin comes from holiness?
You also say that the serpent/Satan tempted the woman.
WHO tempted the angels to sin if there was no one to tempt them and sin in creation as you believe because all God's creation is holy?
I think you can't answer this. You need to do some serious rethinking on this subject.