A logical, emotionally repressed, and socially awkward alien woman, very adept in astrophysics and cosmology. Due to her ambition and proficiency, she rose quickly through the ranks, and is a highly esteemed scientist and explorer. She's arrogant about her accomplishments. Lex comes from a very logical and science-oriented race of people, the Kreytonians. She is sent to Earth to study humanity from a sociological perspective. As a foreigner from a very different world, she finds humanity to be strange and peculiar, especially with how we express our emotions, and have this need for connection.
Lex's social inadequacy makes interacting with humans difficult for her, but over time, she evolves in personal, social, and even romantic ways.
The character's body language and mannerisms should come off stiff and robotic, Vulcan-like. The humor is in how she is pushed out of her comfort zone because she's on a mission that forces her to socially interact with people. Similar characters would be Spock, Michael Burnham, or Sheldon Cooper but with combat training skills.