A mysterious individual who has taken up Eibon's title because of the "brand recognition" it offers. His goal is to use the Book of Eibon to absorb and "collect" everything, which he feels in essence would make him "everything". He was described by Mosquito to be an "avaricious collector", a description which Noah himself agreed with. He is obsessed with collecting anything he deems worthy of his collection, such as the magic tool "BREW", the shinigami Death the kid and even the Kishin. After using soul perception on Noah, Death the kid described his soul response to be "calm to a fault", yet also "terrifying" like "a bottomless abyss of horrors"

Spoiler

It was later reavealed that Noah is an artifical Being created by the Book of Eibon's Index to carry out it's tasks and after The Noah of Greed died he was replaced by A new Noah this time representing Wrath

This is not the same 'Eibon' that appeared in the anime. So far this character has only appeared in the manga and a game entitled "Soul Eater: Monotone Princess". (source: wikipedia)