An antagonistic Ultra who first appears in Ultraman R/B The Movie: Select! The Crystal of Bond, before serving as the main antagonist of Ultraman Taiga. A former friend of Ultraman Tarou's (the father of Taiga), and a scientist who created the Taiga Spark, who would eventually be driven down the path of darkness and combine with Grimdo to gain his current form.
This tag is also used for his Parallel Isotope clone who debuted in the Ultra Galaxy Fight mini-series, a past version of himself convinced to align with darkness before choosing to search for Grimdo (and therefore still in his Early Style).
