Nabasu has brownish-cream fur with a slighter brown mark around his face and his ears are pink, his head and back are dark brown, his chest is light tan, his paws and feet are black, his eyes are brown, and has a furry tail.
Like his sister, Nabasu is amiable, playful, and friendly. He loves excitement and enjoys playing in the Hot Springs. He also is the one asking for an ice slide when Yukiasks for a new home.
Nabasu is seen with his family, enjoying the hot springs. When Anga approaches them to ask a question, they are frightened by her presence and scare her away with snowballs. As Kion uses his Roar of the Elders in an attempt to create a shortcut through the mountain, it causes an avalanche in which Nabasu's family are caught in. After being saved by the Guard, Kion offers to find them a new home.
They stop off at some new hot springs but are startled by Tafu's Scurry, who was only trying to say hello to their new neighbors. However, their commotion causes Nabasu and his family to run.
They fall into a pit, and an attempt by Bunga to save them is futile. Anga is able to fly down and rescue them all together, where they finally learn to accept her. Anga scouts out a new hot spring, and Nabasu and his family leap in. Along with his sister Kimyo, the two persuade Anga to enter the springs with them, where the eagle joins in by lightly splashing the siblings.