Favorite braingirls?

This sub is always going on about punchgirls and musclegirls. What about girls who solve things with brains rather than brawn? Curious if people have any favorites. They don't have to be a super genius or anything, just someone known for being smart, whether that's book smart, or especially clever, or whatever else.

Some of my favorites as examples: Makise Kurisu (Steins;Gate), Haibara Ai/Miyano Shiho (Detective Conan), Kyoko Kirigiri (Danganronpa)