Ezekiel

"You broke the rules, you pay...It's that simple.

-Ezekiel to Nathaniel

Ezekiel was an angel of high reputation.

History
Ezekiel was the angel that sent Kemuel after Nathaniel after Heaven had found out about Nathaniel taking a human lover and tried to have him killed but as an Intelligence angel, Ezekiel sent a warrior after him. Kemuel was defeated and de-graced and Nathaniel went up to heaven in order to speak to Ezekiel (after finding out it was him that had sent Kemuel) in order to find out why Zeke had sent him after him. When he found out, Michael gave Nathaniel a choice, he can kill Lisa and return to heaven or he can continue to love humans and be cast out of heaven.

Nathaniel chose to rebel and was cast out, but when Lucifer was released, Ezekiel was ordered to go to earth and help out. When Nathaniel found Ezekiel in a cemetery after Zeke had summoned him, Nathaniel got pissed and with a snap of his fingers, made Ezekiel explode.