Cait

Cait is a possible companion in Fallout 4. She is a chem-addicted Irish pitfighter and can be found in the Combat Zone. She is able to pick locks up to and including a Master rating, though it can take her a few tries.

Background
Cait's parents were abusive and distant, eventually selling her into slavery once she turned 18. She spent five years pickpocketing in order to buy her freedom, choosing to track down and murder her parents in lieu of rebuilding her life afterwards. She began using Psycho after the murder and found herself in the Combat Zone, fighting there for three years until she joins the Sole Survivor.

Due to her upbringing and time spent in the Combat Zone, Cait is slow to trust and finds it hard to believe anybody would be nice to her without expecting anything in return. Over time she comes to trust the Sole Survivor, telling him/her about her addiction to Psycho and her desire to be cured of it. Her addiction is too strong to be handled by a Wasteland doctor, she mentions rumors of a cure in Vault 95 and requests the Sole Survivor take her there.

Effects of player's actions
Maxed approval with Cait grants the Sole Survivor the Trigger Rush perk, which increases Action Point regeneration when the player character's health is below 25%.

Approval

 * Cait approves of the player character successfully picking locks.
 * Cait approves of chem usage until the completion of her personal quest.
 * Cait approves of alcohol usage (excluding beer) until the completion of her personal quest. Upon completion of her quest, alcohol no longer affects her approval.
 * Cait approves of using addictol after doing her personal quest.
 * Cait approves of threats, violence, and being mean.
 * Cait approves of the player character being naked.
 * Cait approves of selfish action such as asking for, or trying to increase, rewards.
 * Cait approves of criminal behavior such as pickpocketing.
 * Cait approves of helping the Brotherhood of Steel.
 * Cait approves of stopping the Institute.
 * Cait approves of destroying the Railroad.
 * Cait loves when the player character keeps Buddy as part of the quest Trouble Brewin'.
 * Cait loves when the player character tells Wolfgang to lower his weapon at the Drumlin Diner.

Disapproval

 * Cait disapproves of the use of chems after her personal quest.
 * Cait disapproves of speech options that avoid fighting.
 * Cait hates the player character flirting with other characters if she's traveling with the Sole Survivor and they are in a romance with her.
 * Cait disapproves of helping the Minutemen.
 * Cait disapproves of helping the Railroad.
 * Cait disapproves of helping the homeless, such as Sheffield.
 * Cait disapproves of the Sole Survivor calling Hancock a junkie in Goodneighbor before finishing her quest.
 * Cait disapproves of cannibalism.
 * Cait disapproves of joining the Brotherhood of Steel.
 * Cait disapproves of the player character giving the Vault-Tec rep a new home to cheer him up.
 * Cait disapproves of the player character telling Cabot that they, too, believe in alien life.

Appearances
Cait appears only in Fallout 4.

Bugs

 * The easiest and cheapest way to get her to like you is to unequip all of your clothes and travel between locations. Each time you arrive at a new location, you'll get Cait's approval.
 * If you need to raise Cait's affection, you can do so by exploiting a terminal that controls a safe. The player can unlock the safe, which will boost Cait's affection, lock the safe again via the terminal, quicksave, and load. This method will bypass the "refractory period" on Cait's affection and allow the player to boost her affection in a relatively short period of time. One such location is Fiddler's Green Trailer Estates, which is along the western edge of the map, south of Sanctuary.
 * Doing drugs and drinking alcohol while in her company is probably the easiest way of increasing Cait's approval, albeit somewhat tedious (you have to wait for the current chem to wear off before you can gain an approval boost from consuming the next one). If you plan on utilising this, it is recommended to postpone her personal quest (Benign Intervention) until her approval is maxed out, especially if you have already finished the majority of the quests in the game and are therefore lacking in dialogue opportunities and further story decisions. Otherwise your only sure-fire way to get on Cait's good side is picking locks and other NPCs' pockets, which can become even more of a nuisance than drugging yourself up.

Gallery
Кейт (Fallout 4)