Kaleido star prototype work and sketches were more into shoujo style.
Here is how the original characters looked like before they were redesigned.
Sora Naegino Edit
Ken Robbins Edit
Layla Hamilton Edit
Yuri Killian Edit
Anna Heart Edit
Mia Guillem Edit
Kalos Eido Edit
Sarah Dupont Edit
Some more prototype images from KS artbook.
An official trailer with prototype scenes.