As with the other Ultras Arufon'nu was once a humanoid born on the planet that would be known as the Land of Light. When the Plasma Sun was activated she and the other member healed who they could. She was a member of the Silver Cross Corp and a friend of Ultraseven and Zaji. When Seven brought the wounded Miclas from planet Buffalo, Arufon'nu healed the kindly creature. She later left with Seven, Zaji and other Silver Cross members to help Ultraman after his battle with the Baltans.
Later, she went with Seven to visit ancient Planet Earth. The two found themselves garments and went to explore, planning to meet up with Zoffy who had also on-world with them but in another region.
- Unnamed Attack: An unnammed attack, Arufon'nu places her hands beside her color timer and extends them outwards creating a daimond shaped beam that incinerates the target.
- Healing: As a member of the Silver Corp, Aru can heal others with light, so long as they are organic creatures, seeing how she healed Miclas. She can even use this power in human form and it is respected among the healers of the Silver Cross.
TransformationLike the other Story 0 Ultras, Arufon'nu uses Plasma Ore, special material irradiated by the Plasma Sun, to transform. In her case she uses a Necklace, she places her hands beside it and by her will she is transformed.
- Arufon'nu is the first instance of an Ultra loosing his or her powers.
- Besides Mother of Ultra Arufon'nu is the first named member of the Silver Cross Corp