Curie

Curie is a companion in Fallout 4.

Background
A former assistant in various laboratories, Curie, a sentient "Mrs. Handy" robot, ventured into the wasteland to do some independent research. She has a degree in science, medicine, and the French language, but will torch her enemies with her flamethrower in self-defense.

Former assistance
During Hole in the wall you reveal that Curie is a Mrs. Handy modified by one of the scientists of Vault 81 to help in researches. He program her to inherit natures of great scientists (like Curies and Einstein) and added french accent to Curie's speech. He also made other scientists treat her like human, he gave Curie her own personal computer and made her into making notes. She did continue working on scientific researches after all members of secret vault of Vault 81 died, but didn't have any progress on it; she blamed it on lack of experience and material.

Curie after she left the vault
Curie was very excited when Sole Survivor freed her from her's duties as lab assistant, since she could carry on researches now. But, if you spend some time with her, she claims that lack of material and experience wasn't the real cause of her impossibility in progressing in researches - it was her own nature, which lacks inspiration and creative thinking. Curie asks you to find a way to make her human, and it's possible if you transfer robotic mind into synth. Apparently synths is capable of creative thoughts. After you ask doctor in Memory Den she transfers Curie's mind into one of synths that got some kind of lobotomy during another procedure.

Interactions with the player character
Curie will accidentally give player Stimpaks. She will make notices of weirdness of wasteland and human nature, sometimes saying obvious comments like synths do.

Appearances
Curie appears only in Fallout 4.

Behind the scenes
Curie's name is most likely a reference to Marie Skłodowska-Curie, a physicist and chemist that researched radioactivity.