Tina De Luca

Tina De Luca is a resident of Vault 81 in 2287. Like most occupants of this vault, she is busy with repairs and maintenance works in the vault at most times.

Background
Tina has a twin brother named Bobby, whom she supplies with jet to feed his addiction. She admits that it was she herself who caused him to become an addict, but she is also eager to help him get clean, and so seeks help from the Sole Survivor. She is also rumored to be having an affair with Holt Combes, father of Erin. Another theory is that Tina is providing Holt with drugs, much as she had done for her brother. However, these are just speculations as there is no extended dialogue featured in the game to indicate that either are completely true.

Effects of player's actions
She can be recruited to a settlement if the player character is charming enough in the Dependency quest.

Appearances
Tina De Luca appears only in Fallout 4.

Bugs
Additional information for the above, when passing the speech check, it appears it was all going down the successful path, then at the last dialog it switched completely to the failed path. My guess is possibly some editing error in the script.
 * Tina, despite being persuaded to, will not leave the vault to go to a settlement. Upon passing the speech check, she'll agree to go to a settlement, but then never ask where to be directed. The quest "Dependency" can then only be completed by speaking with Rachel and telling her you are bringing her a new patient.
 * A possible fix is to get Bobby to attack the Sole Survivor by directly going after him after speaking to Tina and then insulting him in dialogue. After killing him, Tina won't become hostile and if she is talked into joining, a settlement can be chosen for her to go to.
 * On PC, going to a settlement and then using console command will move Tina to the player character. She will start walking back to Vault 81, but using the workshop interface she can be assigned to the settlement after which she will stay assigned. However, she cannot be talked to at all.
 * If Bobby is killed by the player (either via console command, stealth kill etc.) once he is cured of his addiction, Tina no longer responds to the player in any way. (Needs to be tested to see if the same thing occurs before Bobby's addiction quest is completed or started)

Tina De Luca Тина де Лука