Renim is one of ten Patch Officiants/Priests.
Not much is revealed about his past.
Renim is created by Hiroyuki Takei; he has no information regarding any inspiration used by the author to create him. It's assumed that Renim's named is based on the metal, Renium, since his Japanese name means Renium. He first appears in volume 24: chapter 208, and he never appears in the anime.
He hides above the door as Yoh's group enters his plant. While Ren Tao argues that they should electrocute the river and Lyserg burns off the jungle, Opacho wakes up and tracks down Renim by hearing Renim's thoughts. Opacho defeats Renim with her Over Soul Mama.
Over Soul and Spirit Mediums
His spirit ally is Clear Ghost, a chameleon, and his spirit medium is unknown. His ability is to blend into the backgrounds like a chameleon.