Below we've broken down specific, repeatable actions that will help or hurt your relationship. If you act violently, steal in her presence, choose greedy dialogue responses, or develop a chem addiction, your relationship with her will suffer. To keep your relationship level high, you'll need to avoid actions Curie disapproves of.
She appreciates when you are generous and give items to other characters for instance beggars. When it comes to dialogue choices, aim for nice responses (such as supportive or positive ones), peaceful responses that aim to de-escalate conflict, and mean-spirited responses (she seems to like both nice and mean responses, oddly enough). Having Curie as a companion means making good or neutral choices during your travels, while avoiding bad or selfish choices. Later, the player can transfer Curie's mind into a female Synth body as part of a side quest (which we'll cover in a moment). Curie is a French-accented Miss Nanny robot repurposed for conducting research in Vault 81 where you can recruit her after the "Hole in the Wall" quest that opens the Vault.