Unnamed Demon (Somewhere Between Heaven and Hell)

These two unnamed demons tried to help Lucifer escape captivity.

Background
These two demons decided to help Lucifer by releasing Ramsey the Hellhound, causing a distraction for Crowley. They also presented to Crowley a list of crossroad deals that needed his attention.

With Crowley absent, the two demons went to help free Lucifer from his bounds. However, one of them wanted to make a trade with the archangel, offering to help in exchange for something he wanted. Lucifer agreed, but the minute he was freed, Lucifer obliterated them.

Lucifer informed the other demon that he could not leave any witnesses, though this demon offered himself up gladly, saying his body was Lucifer's to devour, much to Lucifer's discomfort. Lucifer obliterated him too.

Ultimately, their plan failed as Lucifer's true prison was his own vessel and Ramsey was killed by Sam Winchester.