Dr. Vega

, known as Doctor Orihime (ドクター・オリヒメ) in Japan, is the primary antagonist of the second Star Force game. She was a scientist from the Tanabata Kingdom whose research led to the creation of Matter Waves, materialized EM waves, but she disappeared after discovering Murian ruins.

MegaMan Star Force 2
Doctor Vega's designs for the continent of Mu revolve around restoring it to use its power to form the Neo Mu Empire; those who prove themselves to be exceptional in some way would be allowed to become a citizen. However, her plan requires the use of an OOPArt in order to raise Mu from the depths of the Bermuda Maze; which OOPArt she uses depends on the version of the game. To this end, she recruits Hyde, her henchman to use and distribute UMA wave beings, and Solo, the last living Murian.

After Le Mu (Ra Mu in the Japanese version) is defeated, it is revealed that her primary reason for reviving the Mu is to use its power to bring back her dead lover, Altair. He would sometimes refer to her by the pet name Vegalita, and is said to be the only person that Vega has ever formed a BrotherBand with. Altair had to leave Vega to fight in an unnamed war, from which he never returned. As a result, Vega became bitter and ultimately blamed the world for his death. She became a scientist and, after discovering the Mu, she vowed to enact revenge upon the world, leading to the events of the games.

Vega's first Matter Wave creation, Hollow, was made as a replacement for her lover. She hoped it would bring him back in spirit, but Hollow had neither Altair's personality nor memories. Only the image of Altair prevented Vega from destroying him. Hollow was her loyal follower, however, and Vega viewed him as such until he sacrificed himself to save her from Le Mu. Vega realized that then that she loved Hollow as well; not as Altair, but as his own person.

MegaMan Star Force Tribe
In the anime, she is introduced as a famous researcher who is known for her writings on ancient civilizations as well as the invention of the Radio Composer that Tom Dubius used when he was controlled by Cygnus. She recruited Geo (being able to figure out that he was really Mega Man) into helping her hunt down the OOPArts, because she was worried of what would happen should Mu's "Ultimate Lifeform", Le Mu, be awakened. In reality, she wanted to awaken Le Mu and have it rule over the world as its god, eventually revealing this when she had Hollow take the Berserk Sword from Mega Man. In the end, she stayed behind on Mu rather than face imprisonment (as opposed to escaping in the game), leaving her final fate open to interpretation.

Trivia

 * The characters of Vega and Altair are based on the central figures of the Japanese Tanabata star festival.
 * The story, like many myths and legends, varies. In one version, the Goddess Orihime, who spent her time weaving beautiful cloth that was much loved by her father the Tentei (Sky King, or the whole Universe) by the bank of the Amanogawa River, grew tired and sad over her lack of time to find a husband. Concerned, her father arranged for her to meet a farmer named Hikoboshi who lived and worked on the other side of the river. However, after they were married, they began to neglect their work - Orihime stopped weaving her cloth and Hikoboshi's cows began to roam across Heaven. In anger, Tentei separated them across the Amanogawa again. Orihime grew despondent and begged her father to allow them to meet - eventually he allowed for them to meet each other on the seventh night of the seventh month, only for the lovers to realize there was no bridge to cross the river. Orihime began to cry, which attracted the attention of a flock of Magpies, which promised to form a bridge with theit wings. Today, it is held that if it rains on the festival of Tanabata, the Magpies have failed to arrive, and Orihime and Hikoboshi are to remain separated for a another whole year.
 * The "seventh night of the seventh month" actually refers to the lunisolar calender used in various countries before the adoption of the Gregorian calender (also known as the "Western" or "Christian" calendar, originally introduced by Pope Gregory XII as a modification of the less accurate Julian calender). Under the Gregorian calender, the "seventh day of the seventh month" would be July 7th, when many Tanabata festivals are held, however, the proper Gregorian equivalent of the Lunisolar Tanabata is often later. For example, every proper date of Tanabata for the years of 2011 - 2020 will occur in the month of August. In 2017, it will occur as late as August 28.
 * Dr. Vega is the first female main antagonist in the Network-Star force Universe and one of the very few female antagonists to be shown in the whole Mega Man series, following Sera and Berkana.