Inias

Inias is an Angel from Castiel's old garrison.

Background
Inias descends to Earth alongside Hester to secure the new prophet, Kevin. He attacks the demon Meg who is harboring Kevin and Inias' former captain; Castiel. Meg retaliates by slicing Inias' hand with an angel blade, giving him and Hester pause. Castiel appears and attempts to calm his former comrades.

Inias is glad to see his old friend again, but Hester becomes aggressive when she realises Castiel has lost his mind; the result of absorbing Sam's torment. Before they can seize Kevin, however, Dean uses an Angel Banishing Sigil to send the angels away.

Inias later appears at Rufus Turner' cabin with Hester and other unnamed angels for backup. Inias seeks a peaceful resolution but Hester loses her temper and beats Castiel before threatening him with her blade. Inias begs her to spare Castiel, stating that they've lost enough angels already.

Hester is then killed by Meg and the Winchesters allow Inias and the angels to take Kevin once he has deciphered the stone tablet containing the Word of God. Inias asks Castiel to join them, but the fallen angel politely declines.

Inias then leaves with Kevin, but is not seen with the other two angels when they visit Kevin's parents and are subsequently killed by the Leviathan (Edgar) waiting there.