|Spoiler Alert: The following article has information not currently present in the anime or manga. Do not proceed unless you want to be spoiled. |
Regina Babylon (レジーナ・バビロン Rejīna Babiron?) is the foremost genius of her time who created the Babylon Sisters, the Babylons, and the Frame Gears. She lived around 5000 years ago and was one of the citizen of the Partheno Sacred Empire. She is mainly referred to as Professor Babylon (バビロン博士 Babiron Hakase?).
Regina is shown as a beautiful women in her twenties with long messy blond hair that extends to her waist while wearing round glasses and smoking a cigarette in her mouth. She wears a slovenly worn jacket and skirt with a white laboratory coat on top of it.
After her consciousness was transferred into a gynoid, she appears as a 10-year-old child with long golden hair reaching the waist and a pair of jade eyes.
She is a genius but also an erotic person. During her first met with Touya Mochizuki, she lifted her skirt and showed her favorite laced black panties. She likes to tease Touya with perverted suggestions and situations.
She is obsessed with creating new inventions and discovering new technologies to study, replicate, and improve. She is an avid mecha anime fan and watches the shows from Mochizuki's world for inspiration for Frame Gear weaponry and designs.
Regina Babylon lived around 5000 years ago before the start of current story line. She was the most genius person to ever live in her time. Her lifelong rival, Deborah Elks, a master of magic craft in Partheno, comes second with huge margin after her.
About 5092 years ago, she began to create the gynoid and the Babylon after seeing into the future through her magic tool. Through her clairvoyance tool, she found Touya Mochizuki and became invested in him. She then created the Babylon as her legacy to Touya while also creating 9 gynoids, the same number as the number of Touya's wives from what she saw in her clairvoyance, based on what she thought his preferences were. She passed away at around 4907 years ago.
After Touya found the Laboratory of Babylon, her consciousness was transferred into the last gynoid, airframe #29. She is later introduced to Yumina and the others who are surprised by her appearance and the fact that she is still alive.
- All Magic Attribute: she is another person that being introduced who has aptitude to all magic attribute beside Touya Mochizuki.
- "My Favorite" (「ボクのお気に入りだ」 Boku no Okiniirida?) - Regina Babylon when showed Touya her panties.