Not only for the company, an extra gun is always handy, and your companions usually have a skill, such as lockpicking or hacking. This can be used to cover some of your own weaknesses and not leave any container unchecked.
Spoilers ahead, people! You’ve been warned!
One candidate for your wasteland partner is Cait. This chem-addicted redhead with the Irish accent can be found in the combat zone, a fight club for Raiders. You’ll find it rather easily by walking a bit east out of the gate of Diamond City. If you stumble upon raiders, you’re probably on the right track!
Once you’ve cleared the Combat Zone, speak to Tommy inside of the cage and he will offer you Cait’s contract. She does not trust the player at first, but over time the two of you will get along swimmingly.
Cait was raised in the wasteland to abusive parents who after she turned 18 sold her into slavery. She spent five years as a slave, stealing caps until she was able to buy her freedom. Shortly after being free of her bonds, she tracked down her parents and murdered them. With the guilt heavy upon her conscience she turned to chems, more specifically Psycho. She then spent her time fighting in the Combat Zone until the player encounters her.
After she trusts you enough, she will tell you about her history and give you the quest “Benign Intervention” which sets you upon the path to cure her addiction to chems.
Maxing Cait’s approval will grant you the Trigger Rush perk, which increases action point regen when your health is below 25%
To increase your approval with Cait, perform some of these actions:
Successfully pick a lock Consume chems and alcohol (Only works until you complete her quest, then she will approve of using addictol) Intimidating, violent or greedy dialogue options Criminal activity like pick pocketing
However, she disapproves of these actions:
Use of chems after completing her quest. Dialogue choices which avoid combat Cannibalism
Other than that, there are a few unique choices you can make to increase or decrease your approval with Cait. These are mostly only able to be done once, such as siding with a certain faction during a quest.
If you’d like a fighter as a companion with rather fun dialogue and a mastery in lock picking, Cait is an excellent choice. Just make sure to keep away from the chems once you’ve completed her quest!