From The Heretic Knowledge Vault
Eben is an Ensigerum monk of unknown standing, but apparently important enough to accompany the Imperatrix while she talks to Ian Samael, and unimportant enough that he immediately gets delegated the task of giving Ian his pants when the need for such a task arises. In his initial appearance, his name was in a very small font, and was misread as "Eren" in some Forum entries and elsewhere. However, the spelling used here appears to be correct.
His only distinguishing feature thus far is a scar on his left cheekbone.