I would make this the back story to a 200 year old home maintenance and repair bot programmed to repair and maintain a home and serve its occupants. Unless there is some back story included in the game, its story is open to the imagination.
In mine it wouldn't be a hero, it wouldn't be cutesy like ED-E, and it could provide a lot of insight into what happened locally. Abandoned with the family dog it could take care of the dog until the dog dies.
The dog could mate with other abandoned dogs and they stay around because there is a voice like they grew up and lived with that is programmed to sit the family pets. The pups could grow up learning from how the older dogs of the pack respond to their bot pack leader and how they act around the bot and other surviving domestic “bots in the ‘hood “programmed to care for their family, the family pets and maintain their home.
The fallout wiki has such bots repairing each other to explain why the free roamers get along without humans able to maintain them. I imagine they can be tweaked and upgraded to do many tasks at higher levels; grounds keeper, gardener, accountant, tutors/companions for people with special needs, tireless, patient companions for the elderly, tutors for the children of ‘tiger parents’.
Abandoned the tweaked ones up grade each other and the other bots with parts and programs from the stocks of local cybernetics and computer shops, parts and program stores (imagine the high end custom programs and upgrades there might be for well to do ‘tiger families.’) Such bots could develop a lot of capabilities many owners might not have been able to afford. Multiple high lift ducted fan thrusters mounted around the body as opposed to a rocket lifter, a trio of extra arms that can also function as legs, mounted where the rocket thruster was mounted.
The bot doesn’t have to be cutesy or witty, just a good reliable keeper of the dogs who react to them like they would people who care for them to the best of their human ability, bots are consistent, patient and never cruel. Kind of like the T-800 in Terminator 2 with the young John Connor because that is how it has been programmed by the future John Connor.
Possibly show the bot or bots with puppies clamoring for attention and to be stroked, into middle age. Show the bot praising them, training them and comforting them through out there lifespan because dogs like people like and need such attention.
With proper AI I believe a bot could be a better more attentive, dependable keeper/companion, (learning to read and meet the needs of those they care for better than a lot of people.) Isn’t that what they would be programmed to do with the humans they serve?
The bots stray further afield to find needed resources to care for and repair their home and meet the needs of their charges, and are sometimes captured or looted and have to escape to return to their pack, though it might take years. Sometimes far from home, they find a new home, a new pack, in a settlement or survivalist community where they and their programming are appreciated.
Sometimes they have their pack with them and lose dogs trying to protect them. They aren’t looking for trouble; you’re picking a fight for what? They recover their fallen and bury them at home as most families would. Sometimes they just have a serious failure and their loyal dogs guard their fallen bot until a friendly searching for them finds and retrieves them.
Though few attack a bot, or bots from “the ‘hood” fitted with at least a blow torch or cutting torch, power saw, maybe edged weapons, maybe six arms, adding ax, meat cleaver, machete hovering head and shoulder height with a pack of trained dogs in K-9 armor, fighting as family.
I suspect a modder or programmer who knows dogs and has artistic talent could convey a lot with a few puppies who get the care, attention, ‘affection’ they would crave from a human, from a bot or bots, because look at the heartless human debris dogs can learn to love and be loyal to (think of people who raise dogs to fight dogs.)
How do you feel about a bot who earns the love of an old dog it has comforted cared for all that dog’s life, and is there to comfort till the dog dies of old age with their faithful servant in attendance? There is a lot that talented artists could say about service and kindness, appreciation and love, selfless service, and “love not human” without being ham handed and wordy, with images alone.
Most who have commented on this topic, only know of Handys from a 'step and fetch it' type butler bot program, as nothing but comic relief. and can't see it as more than cowering and hiding for 200 years and have no respect for it as a companion, I've always felt they had much more potential.