He will be of Roman descent (Daniel 9:26). The passage says the Antichrist will come from the people who destroy the Temple. The Temple was destroyed by the Romans in 70 AD.
He will be a Gentile (Revelation 13:1). He is portrayed as "coming up out of the sea." The sea is used in prophecy as a symbol of the Gentile nations. See Daniel 7:3, Luke 21:25 and Revelation 17:1.
He will rise out of the revived Roman Empire (Daniel 2:31-45 and 7:1-8, 24-28).
He will be an egotistical braggart (Daniel 7:8, Daniel 11:36-37, 2 Thessalonians 2:4, and Revelation 13:5).
He will be a blasphemer (Daniel 11:36, 2 Thessalonians 2:4, and Revelation 13:5-6).
He will be strong-willed (Daniel 8:24 and Daniel 11:36).
He will show contempt for human traditions by changing the laws and the calendar (Daniel 7:25).
He will be shrewd and deceitful (Daniel 8:23 & 25, Psalm 43:1, and Psalm 52:2).
He will be a destructive man of bloodshed (Psalm 5:6 and Daniel 8:24-25).
He will persecute believers (Daniel 7:21 and Revelation 13:7).
He will be a sexual pervert (Daniel 11:37).
He will be a militarist (Daniel 11:38).
He will be possessed by Satan (Daniel 8:24, 2 Thessalonians 2:9, and Revelation 13:2).
His nature is also reflected in the titles he is given in Scripture:
"The Beast" (Revelation 13:1)
"The Man of Lawlessness" (2 Thessalonians 2:3)
"The Son of Destruction" (2 Thessalonians 2:3)
"The Despicable Person" (Daniel 11:21)
"The Willful King" (Daniel 11:36)
"The Worthless Shepherd" (Zechariah 11:17)
"The Insolent King" (Daniel 8:23)
From the Jan/Feb 2009 edition of the Lamplighter magazine.