Helena von Baehbem is the niece of Ernst von Baehbem. A childhood acquaintance of Makoto Isshiki and Itsuki Kisaragi, she serves as the second in command in the Baehbem Foundation. In addition to being a childhood dabbler in witchcraft, she was a potential instrumentalist, but passed the ideal age without realizing her potential. This makes her jealous of Quon and others that might succeed in tuning the world

In the year 2012 Japan was invaded by the Mu. Human-like beings from another dimension with blue blood. 
In the year 2015 Tokyo is attacked by invaders, who are repelled by a humanoid weapon called a Dolem. During the chaos, Ayato Kamina meets Reika Mishima, a classmate. 
During that same day, he is attacked by government officials but a woman named Haruka comes to his rescue, informing him that she was sent to get him by the Organization TERRA, and that Tokyo had been sealed in a time rift where time flows one third as fast as the outside world. 
He flees from Haruka onto a train where he sees Reika once more. Arriving at the Room of Rah, he follows her to a tremendous egg where the Dolem RahXephon is hatched from, and upon her singing his mother appears atop the Dolem that had stopped the TERRA Invasion. In the battle Ayato's mother is injured, and Ayato flees Tokyo Jupiter with Haruka upon seeing his mother's blue blood.

She was married to [Achim Geisler](https://anilist.co/staff/132226/Achim-Geisler).

[Synchronkartei](https://www.synchronkartei.de/person/GKywnFOfb/sprecher)

Ayato Kamina was separated from the girl he loved, Haruka Mishima, when an event occurred that was thought to have killed everyone outside of Tokyo. But one day three years later, invaders suddenly attacked the city. It was then that he meets an agent of TERRA, Haruka Shitow, who tells him that she will give him the truth about the world. It is the beginning of a series of strange events, which involve him activating a giant mecha, the RahXephon and finding out that many people, including his own mother, has blue blood, and that he was actually living in a self-encased dimension where time moves slower than that of the outside world.
 
(Source: Anime News Network)