English Voice: Kate T. Vogt
Seiyuu: Yuko Kobayashi
Recognized by herself and everyone else as the greatest scientist in the universe, her intelligence cannot be matched by normal means. She's very playful and always overflowing with confidence. She spends most of her time in the alternate-dimension laboratory she built inside the Masaki house.
Even though Washu's a bit egoistic and eccentric(I guess most genius scientists are ^^,,,), she's probably the wisest and most reasonable of the bunch. She can remain calm and logical through even the most extreme situations. Just don't forget to call her "Washu-chan!" ^_^