Definitely throwing in votes for Setsuna as a student, astronomer, and nurse. I love seeing her apply herself to science in ways that tie into her character lore — and as for nurse role, it was great seeing her with Hotaru and Chibi Usa.
I love, love Setsuna being a science student (I actually forget if it was theoretical physics or astronomy) at KO in the Infinity arc of the manga. It gives her that characterization of intelligence like Mamoru and Ami. I haven't watched the 90s anime, but I feel like the idea of Setsuna simply being a school nurse does a disservice to her character.