Bill was adventure, a curious boy who grew up to be an amazing cursebreaker. And Bill was a parseltongue like his siblings.
For Bill parseltongue was a great gift for his ancestors, a excellent advange over the other cursebreakers. Parseltongue was an habilitie great seeked in the cursebreaker of Gringotts, and they kept secret whom among their ranks knew the snake languague.
Parseltongue was a great hability to have, it allowed to read parselscript in some antient tombs, read secrets of them or advertences of danger. It helped cursebreakers know where to look asking the local snakes.
Charlie was a parseltongue like the rest of his brothers. As a boy he had a fascination with dragons that only grew with age, to his mother horror.
To Charlie's great surprise, and his mother relief, dragons spoke a dialect of parseltongue. It allowed Charlie to comunicate, somewhat with dragons. He was the go to man in case there was trouble with a dragon. And Charlie learn a lot about the creatures, and cherished them to his death. Dragons were Charlie one and only love, and parseltongue obly made his jobs even more interesting, dragons had amazing adventures and tales to tell.
Percy liked order and laws that make that posible. As a young boy Percy always looked at his father, and wanted to follow him, achiving a career at the Ministry. Parseltongue wasn't something that he paid attention to, he found the language interesting but Percy liked to read and learn, and there wasn't any books in the language that he could learn from them.
That dessinterest turned into hate, when he found outhow her baby sister had been possesed by He-who-must-not-be-named, a known parseltongue. It didn't help that the twins liked to prank him using "spells" in parseltongue, which were more difficult to undo.
But after the battle of Hogwarts the language redimeed itself in the eys of Percy, at least in part. It seems that it was thanks to it that Ron had accessed the Chamber of Secrets where he had gotten his hands of a basilisk's fang and that had help destroy Riddle. And the twins, they had used his parseltongue "spells" to cause chaos, help cover other alies and incapacitate enemies. He was almost sure that it was that what safe George live, even if Fred hadn't been so lucky.
For Fred and George parseltongue was a extra cool ability to cause chaos arround the house and plot without their parents knowing. Itwas specialy usefull when their older brothers had left to Hogwarts, as the both knew that Ron and Ginny wouldn't say a thing to their parents, not like Percy used to do.
Once at Hogwarts, with a great number of people to prank, the twins focused on those that bullied other, there were to many people at school to prank everyone and noone deserve more a bit of humiliation thathem. And wasn't it ironic that most of them were Slytherin being pranked with the magical language that their founder loved so much to use. That the bullies, sons and daughters of Death Eaters, suffered by the tongue of the loved leader of their parents. And not only "spells" in parseltongue, that were only instructions caregully crafted what they said in the magical language while focusing in the result that they wanted, but potions too, if you knew the languague the snakes were very helpfull in probiding ingredients, like some old seddings or eggs from their already born kids, which gave them a lot of ingredients yo use and experiment.
But when things started to get serious, the twins not only used their parseltongue to prank and create joke products. Potions were created with a more destructive nature and their "spells" were for fun but to incapacitate enemies.
For the twins parseltongue was a tool, one that wasn't enought to help Fred survive the war. But one that George was sure had, at least, keep him alive, and with him Fred's memory would be reminded.
Ron was the youngest son, a lonely boy who was hoping to go to Hogwarts. He wanted the world to know Ron Weasley to be diferent for his brother, to be recognice not only as the sixth son of Arthur Weasley. But more inportantly Ron wanted a friend. Even having a magical language didn't made him different, as all his siblings had it too, parseltongue wasn't anything that Ron cared.
It didn't take long for him to get that, a lonely boy in the express turned out to be the famous Harry Potter, and he wanted to be his friends. It wasn't long when adventures started to happend, he might be Bill, but he loved them.
But when everyone had acused Harry of being the Slytherin Heir, Ron stuck with him as he knew that his friend was telling the truth, even if just him and his sibblings had understood what he had said. For once parseltongue had an use. He knew he was sometimes jealous and that he detested everything that related with dark magic except parseltongue. Ron knew that if he hadn't been a parseltongue he would have acussed his friend and diched him after the dueling club.
Parseltongue didn't had more uses for him, the twins hadn't taught him their parsel "spells", not that he had asked. And there wasn't any use for it.
With hips and bounds, Ron found himself in the need to open the chamber of the secrets. They neded a parseltongue to open it and retrive a basilisk fang to destroy of of Riddle's horrocruxes. Luckily he knew the language, and even if the sounds came clumsy from his mouth the door opened, and the fang obtained. He might have lie to Hermione about how he knew how to open it but that was something to tell her later, for know they had a Dark Lord to defeat.
And that was the one and only time that Ron used parseltongue, it wasn't something usefull for him in his daylife, so he focussed on other things and left parseltongue aside.
Ginny was the only girl in the family, and after six boy she was the little princess of the house, and she could recognice but when you don't live in luxury having new things instead of hand-me-downs was nice. Ginny had an only friend, a neighbour girl call Luna, and she was a little extrange, but Ginny liked the company of another girl. But there was a secret that Ginny kept for her own, not even telling Luna, she was sure that the other girl knew that there was something different about her, but for now she hadn't say anything. Ginny was a parseltongue like the rest of her brothers, an useless hability that was the brand of the last Dark Wizard that had asolated the country, and Ginny didn't want to have anything in common with him. Especially because Ginny wanted to marry the Boy-who-lived one day, like probably most of the girls her age, and she didn't like havinganything in common with the man that murdered his parents.
It was her first year at school when she got her hands into a diary that write back to her, a boy named Tom was nice and comprensive, and was a parseltongue himself and understood her point of view about the magical language. But in the end, the nice boy turned to be the most infamous Dark Lord, and had possesed her to free a basilisk in the school. Tom had confirmed her that if she hadn't been a parseltongue she would have never been possesed, as even if one was under the control of an horrocrux the parseltongue didn't transfer to the host. After all the damage, pain and suffering that she had cause Ginny opinion on parsentongue passed from indifference and annoying hability to profund hate.
It wasn't after years from the war had past and she had married Harry when she was able to reconsider her position on the mater. It was, actaully, Harry Potter the-man-who-win, the one that had suffered more at the hands of a parseltongue, that was able to convince her that it was just an hability and that it didn't make anyone good or bad, and that it would be usefull if their children spoke the language, as she would be able to understand if they were up to no go.