CAA: Christian Anime Alliance

Does Satan lose his angelic appearance when he rebelled against God.

No.The Bible clearly states that Satan can appear as an Angel of Light.

What about demons

I had heard that he lost his beauty when he was cast out of heaven, and St. Michael was given his position. However, that still doesn't mean he can't "shape-shift" to look like something deceptively beautiful.

Presumably they can too. I mean Satan is a demon himself.

There are a handful of theories but I think it's safe to say that Satan and his demons are fallen angels. Jesus Himself referred to Hell as "fire prepared for the devil and his angels".

I second Mitsuki and W4J.

2nd Corinthians 11:14 "No wonder, for even Satan disguises himself as an angel of light."

I would say this applies to demons as well and Satan followers. I don't exactly think he's some mobster lookin' dude slinkin' around with horns and a pitchfork. Evil often looks appealing, that's why it's so tempting. The tree of knowledge looked good to Eve and was one of the most beautiful trees in the garden. I also read an article saying that the serpent in the garden may have been a poetic metaphor for a fallen angelic being in the Hebrew text, but I haven't really research that so I don't know.

As for the Michael thing... well, I'd have to say since it's not in the Bible I wouldn't count it as much more than mythology unless you have some kind of Biblical evidence for it. *shrugs*

There's a lot about the specifics of Satan's rebellion and the nature of angels (fallen and not) that scripture just doesn't say. To be honest, I don't think it matters all that much. Be he beautiful or ugly, Satan still lost

I just appear to second what Temmy and Blitzkrieg said. Regardless of where Satan came from or what he did before humanity appeared, don't matter. He can appear as an angel of light as the Bible states, and well, as for demons, the Bible doesn't say but I think it would be safe to assume like for them. Evil has two great tricks that it uses against humans: that God does not exist, and that evil appears to be good and wonderful.

Yeah, I think Nate summed it right nicely. So the demons that are with him are the one third of the angels he took with him? Thats a stupid question but Im just trying to clear it up for my sake. Satan can appear any where if you let him and everyone on the face of the earth that has been, are, or will be tempted by Satan. And even Jesus was tempted, but because He was without sin he didn't fall into it. So we should always look to God, Jesus, and the Holy Spirit for direction because it doesn't matter who you are; if you don't have Jesus you WILL fall into temptation. And temptation comes in many shapes and forms, so be on the look out for it. Because Satan knows your weak spots and will use those to his advantage to crack you open to a sinful life. He will make the things that you are weak about the most in your decision and make them seem appealing. Its like a rabbit trap, he puts the bait under an upright box and then once you go for the carrot he pulls the string and captures you. I hope this made any sense and Im sorry that I went off topic a smige.

In the Screwtape Letters, Wormwood recommends to Screwtape that he practice appearing as an angel of light in order to tempt his "patient" easier.
And no, animedude, that is no way off topic. It's an excellent analogy.
Remember, as it says in The Screwtape Letters:

The safest road to Hell is the gradual one — the gentle slope, soft underfoot, without sudden turnings, without milestones, without signposts.

I had to read that book for 11th grade English, I think...it was very insightful.