|This article is about a/an Orphnoch in Kamen Rider 555.|
The Barnacle Orphnoch (バーナクルオルフェノク Bānakuru Orufenoku) is an Orphnoch who assumed the form of a Smart Brain Employee (スマートブレイン社員 Sumāto Burein Shain).
He is the man responsible for causing the fires that killed the parents of Mari and later Teruo's. He was eventually fired by Kyoji Murakami for his incompetence and marked for death when his actions attracted attention from law enforcement, with Kitazaki given the task of killing him. Barnacle was unaware of this and attempted to retrieve the Rider Gear until he was killed by Faiz ('s) Grand Impact.