Have you seen any Character similar as Wall E 'Eva' anywhere?

Yes, I know of one:

Herbie of the Fantastic Four.
https://www.google.com/search?q=herbie+fantastic+four&safe=active&source=lnms&tbm=isch&sa=X&ei=jgdwU5WbPNL6oATNm4CwBA&sqi=2&ved=0CAYQ_AUoAQ&biw=1366&bih=623

Similar body shape and color with little lights for eyes. Herbie is a robot that serves the Fantastic Four.

Also, compare:
http://4.bp.blogspot.com/_lnLvGtlX2VI/SXyIQHyRiCI/AAAAAAAACT8/Dz-3m0xTqVo/s400/eva.png (Picture of EVE from Wall-E)

and

http://upload.wikimedia.org/wikipedia/en/7/7c/Frichardsherbie.jpg (Picture of Mr. Fantastic and Invisible Woman’s son and Herbie)

Wall E himself looked quite a bit like Number 5 from Short Circuit.

R2D2 as a prototype for Eva also comes to mind. She’s much more sleek and modernistic, but genetically there’s something about the whiteness, the domed head and blinking lights for eyes.