Norowa Hikage

Norowa Hikage (日陰呪わ, Hikage Norowa) was a member of the Hikage clan over 400 years before the start of the series. He is the creator of the Mōmokugan and Norowa Mōmokugan. While brilliant, he resorted to human experimentation in order to further his goals to obtain the power of the Sage of the Six Paths. Upon the Hikage clan discovering his true nature, he took over the clan and forced them to ingest a drug that rendered them blind.

Background
When he was young, Norowa would often listen to his grandfather tell stories, with his favorite being about the Sage of the Six Paths. While growing up he was taught ninjutsu by his mother, but was particularly skilled with medical ninjutsu. Upon becoming an adult, he set out on a several year journey in order to research the Sage. During this time, he discovered that the Sage's power was not exaggerated and became obsessed with obtaining the same power.

Upon his return home at the age of 22 he outfitted the secret room in his house with various medical tools and lab equipment, as well as soundproofing the room. After a year of researching the Sage's lineage, he discovered that the Senju and Uchiha clan's were his direct descendants. He then left for the Land of Fire and kidnapped a member both clans and smuggled them back to his house to begin experimenting on them.

Personality
Outwardly, Norowa appeared to be an introverted and awkward individual who did not like to be around large crowds, but he actually fakes this personality so that people would not think it was suspicious when they didn't see him for long periods of time. He was also willing to betray people's trust in him when it suited his needs as shown when he offered shelter to an outcast, only to plan on using him as a test subject later.

He is also shown to have no love for his clan when he took over its leadership, forcing them to ingest a drug that would render grant them the Mōmokugan while rendering them blind.

Since he was young, he harbored a love for old stories and myths, but was particularly fascinated with the Sage of the Six Paths. When he became an adult, he began to research the Sage and eventually became obsessed with obtaining the same power that the Sage had. This obsession eventually led to the point to where he kidnapped two of the Sage's descendants and cruelly experimented on them in hopes of obtaining the Sage's power.

Appearance
Norowa was a fair skinned young man who had long, shoulder-length, black hair kept in several braids and had bangs that parted around his forehead. He originally possessed the featureless white eyes (with a hint of lavender in the anime) of the Byakugan, but upon ingesting a drug of his own creation, they lost their power and turned pink, while awakening the Norowa Mōmokugan on his forehead. His usual attire consisted of a plain, white shirt underneath a red jacket with numerous pockets on it, along with dark-colored pants and brown shoes, along with a green forehead protector that he discarded after obtaining the Norowa Mōmokugan.

Reference

 * The picture was made in Rinmaru Games's Anime Mega Avatar Creator: http://www.rinmarugames.com/game/?game_id=421.