The Most Powerful Super Girl Akidora
Akina and Hydra were no match against Valkyrie Ghost. They each start special training, hoping to defeat her one day. But something happens and Hydra and Akina combine into one and become the most powerful super girl “Akidra”! Now they go to school as Akidra, the super girl with awesome psychic power and physical strength.
Aired 28/11/2003EP 9 - The Most Powerful Super Girl Akidora
2003
UFO Ultramaiden Valkyrie 2: December Nocturne
Valkyrie, Kazuto, Akina, Hydra and friends are back for more when the Key of time suddenly appears along with many other mysterious happenings. All seemed to be linked to a person named Valkyrie Ghost whos only goal is stealing Kazuto for herself. As they team up against this seeming unbeatable foe they dig deeper into the mysterious past of Valkyries home planet, Valhalla.
(Source: Anime News Network)