Here's a bio for the greatest scientific genius Washu!

OAV/Universe/Tokyo
The greatest super-genius in the galaxy!! No – the universe! All the dimensions! And I’m cute, too! I have created great inventions, like Ryoko and the Interdimensional Tunnel. I don’t know why I’m not head of the Royal Space Academy for my brilliance – but it’s just as well. I have too much to do!

Age: 20,000+
Height: 4'4"
Eyes: Green
Voice Actress: K.T. Vogt

Bio taken from The Official Tenchi Muyo Website