Gabriel

Acting as a demigod, Gabriel behaves in a mischievous manner enjoying toying with his victims, humans he believes should be brought down a notch. He embraces a hedonistic lifestyle, including the "sweet tooth" for which that type of demigod was known for.

Even after revealing himself to be an Archangel, he still used misdirection to achieve his goals and to protect himself. He is often sarcastic. Gabriel's manner is the most human of any of the angels so far, perhaps because of his long sojourn on Earth. He holds humans in high regard, despite their many faults, something the other Archangels did not, not even Michael.

Like all other angels, Gabriel's true form is incomprehensible to most humans, manifesting as a bright light rather than an actual shape. Gabriel has yet to be seen outside his vessel, however.

Gabriel also has the ability to alter his vessel's appearance. The way he appears is most likely not the original form of the person he possessed, given that he took after Loki, who's shown to be identical. Gabriel took on many forms in order to trick the Winchesters, such as that of an elderly man and a cop.