Louise is born in S.1189 in Remiferia. She lived in Crossbell for a while around three years ago when she was 13-14 as her father moved there for work for a couple of years, leaving when Mishelam Wonderland was completed but managing to visit it once. Her father works as an engineer for the Orbal Net, under a Venture company based in Remiferia, and as such, Louise holds a great amount of knowledge over telecommunication technology.
At the age of 17, she enrolls at the Thors Branch Campus as part of Class IX: Military Finance under instructor Towa Herschel. She joins the Tennis club along with Juna Crawford and Jessica Schleiden. She finds Kurt dignified and Ash a delinquent but rather cool.
Louise reminisces of the original Mishy strap design she used to have, but Rean manages to locate a new one for her as it is was important to her. Rean also helps her in the Tennis club and to revise for the midterms, in which she does quite well.
Over the course of the story, Louise takes over the role of handling communications on the Derfflinger. She handles the personnel files.
After the Great Twilight, Louise was sent o Crossbell where she is collecting information on the Orbal Net and coordinating everyone. She has been staying with the Crawford family. She passes on the information about a genius hacker active in the Governor General's absence and receives a mail requesting a meeting between them and Class VII. She wishes them luck and passes on information about other student's whereabouts and activities.
She later travels to Milsante and then later the Aurochs Seaside Road during her efforts to support Class VII, passing on information about a secret route to Leeves. Rean and company help her locate the source of a noise and signal which is interfering with their mission, tracking it down to some old archaisms activated by Black Pleroma Grass. She also travels to Leeves for a tennis match with her club as part of Juna's bonding event.
In the final battle, Louise operates the laser banks and missiles on the Courageous II.
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