I don't mean to insult your choice of Siamese Vriska, but I was looking through cat breeds on Wikipeda, and stumbled apon 'Korat' Cats. Quoted from the article - They are known colloquially as the "good luck cat" - which seemed, personally, very fitting.
Ohh! No, no insult what-so-ever! I love the fact that you considered another breed because I thought about the cats for awhile and talking about the why’s and why not’s is super fun! I considered a Korat cat for awhile but visually
they look too sweet and far too much like a Russian blue
The thing about an oriental Siamese is that they’re well known for being loud and obnoxious, they meow Constantly
they also have this very elegant but angular look which matches Vriska better than a soft round cat, most importantly they are well known for their blue eyes
*I also wanted diversity in the cats body types so a Siamese helped add more to the group
Thank you for this ask though!! I thought about the breeds for much longer than I probably needed to so I love talking about them!!