Morse, also known as Dark Bear, is an Eques warrior and Bone fighter originating from the planet Nepo Anegelis. He is a subordinate of Liebert, a high-ranking figure among the Dark Bones, and is first encountered on Earth after Liebert's defeat. He appears alongside his partner Gustos, known as Dark Grizzly, and their shared objective is to exact revenge on Shougo Ryuujin for the injuries he inflicted on Liebert.

In terms of personality, Morse is characterized by a sinister and manipulative demeanor. He is a strategic thinker who uses his intelligence to orchestrate plans and schemes. His primary motivation is his loyalty to Liebert and a personal vendetta against those who wronged her. Within the story, Morse serves as an antagonist who directly opposes the White Bone warriors, particularly Shougo Ryuujin. His role is that of a recurring threat, appearing after Liebert's initial loss to continue the conflict.

Morse maintains a close working relationship with Gustos, and the two often act together. His key relationship is with his superior, Liebert, to whom he is fiercely devoted. He is also a direct enemy of Shougo Ryuujin and the other Majin warriors. Development-wise, his story centers around his persistent attempts to avenge Liebert, which drives his actions throughout his appearances.

Notable abilities include immense physical strength, the capacity to control dark creatures, and the ability to wield dark energy in combat. He is also a capable strategist in battle. However, he is vulnerable to the light-based powers of the Majin warriors, which can weaken him and provide a path to his defeat.