Shimi Baku

Shimi Baku is a founding member of the Akatsuki but has remained in the shadows of Nagato and Madara. He acquired his Mangekyō Sharingan eye from an unnamed Uchiha before the creation of the leaf village. When he first transplanted the eye into himself he gained several powers including one that stops his physical body from aging. He also posses a Kekkei Genkai from an unnamed clan. His Mangekyo Sharingan is in his Left Eye while the Right Eye is from the Da-Ku Kekkie Genkai.

Personality
He has high patience and doesn't express emotions of happiness or sadness. When angered may fly into a rage and kill the disruption in his life. In battle he stays calm and doesn't underestimate his opponents. He often tries finish battles instantly with his abilities as he doesn't like wasting time.

Da-Ku
The Da-Ku is a Kekkei Genkai from an unnamed clan. It allows the user to create a Genjutsu in which the target will face the hatred of themself. This is similar to The Falls of Truth.