Birthdate: November 1, 2290 A.D.
Age: 17 (A.D. 2307 - Season1), 22 (A.D. 2312 - Season 2), 24 (A.D. 2314 - Movie)
Blood Type: O
Height: 154 cm (A.D. 2307), 157cm
Weight: 45 kg (A.D. 2307), 44 kg
Unit:

Before and during the events of A.D. 2307, Louise has a dominating spoiled rich girl personality (due to her family's wealth) and she constantly tries to get things to go her way. She's not above manipulating, whining, and complaining about her issues until people around her caves into her demands. She's the sort of person that knows what she wants and it was she that started a relationship with Saji. Louise easily gets jealous if Saji makes contact with other women.

Not much is known about Louise's past. All is known is that she comes from a very rich family in AEU, Spain. While the nature of her family fortune is unknown, the Halevy fortune grants her to live a well funded lifestyle. Sometime before AD 2307, she convinced her family to allow her to study in Japan in a aerospace school to study engineering.

In the first series, Louise Halevy is Saji Crossroad's girlfriend and fellow classmate. She becomes an acquaintance of Setsuna F Seiei when the latter becomes Saji's neighbour.

It's believed that Louise can fluently speak Spanish since she was born in Spain. During AD 2307, she was educated in aero-engineering; however it's unclear the full aspects of her education. Not much about her was developed until AD 2312. After losing her left hand in the events of AD 2307, her hand has been replaced with a prosthetic; suggesting a bionic-hand above human strength.

In the 4 year difference, she inherited the Halevy fortune, making her one of the richest women in the world; however she devoted all her resources into funding A-Laws and Innovators in MS development. Because she's an investor into the ESF's planetary security, she has been given special treatment. It's also why she has clearance and access levels above her rank.