Well, I was going to argue about not repeating universes again, but then I realized that the child of Kiritsugu are both from Negima, so why not? And Mara isn't one of the most broken Jedi (although post-RotJ almost every Jedi and Sith are pretty broken)
I was thinking both of DS (it's her anger, mike, even if amplified by AM) and in Fate when Rin tries to kick her from the Emiya household, or when Shirou introduced Saber. Also HA.
Well, Sakura shows occasional fear of Rin, but I don't even recall any signs of anger.
To be fair, the posibility is still there. It's just that, unless someone like Shirou perturbs her, she has it under control.The thing is, though, that without the events of HF, the connection never gets activated, and thus it has zero effect on Sakura. So, I see no reason for her to turn Dark.