Frida and Kristoffer wanted to become animagi too? Let's take them up seperately.

Frida: Was she even capable of having ambitions? The only thing going for her was that she had pureblood and that she had a womb, so she would give birth to as many new purebloods as possible. At least she wasn't like some of their cousins, who were more likely to run off with a muggle, just to prove something.

Kristoffer: Wasn't he dumb like an animal already? He was lucky to be taken under Papa's wing, because Uncle Orestes had spoiled him way too much.

Of course Gretchen would manage to turn into an animagus before them.

Then, her cousin brought up Seneca's brothers. "Which one are you referring to?" she asked in bemusement. Claudius, she assumed. He hadn't done something overly significant, but he wasn't a failure either. Unlike Cash, who hadn't used his potential and his bright mind yet. That being said, Seneca had a blindspot for her "failure" brother. If Cash wasn't her brother, she'd consider him a failure who deserved to be stripped off his free will and be imperio'd into doing something useful. With Cash, she even excused his Quidditch career a bit. At least he had a passion for a magical sport, unlike some wizards who had as many muggle hobbies as they could find. And she was sure that Cash, with his bright mind, would take up some research position after his Quidditch career was over and he'd do good for the wizarding community that way. Then, he would marry a good pureblooded girl and bring as many pureblooded wizards into the world, so their kind wouldn't die off.