From the more detailed artbook, this is a higher resolution scan. This is my translation of page 55 specifically from the book. I provide the transcripts below the image, as well as the original! Please provide a link back here if you use it is all I ask!

Read more for the English transcript, and the original Japanese image/transcript!

Design Artworks
Celestia Ludenberg
Lace
There are 4 buttons, 2 by 2.
There is just one pointed-shaped ring.
The hairband actually looks something like this.
The ribbons tie on the opposite ends.
＊Earring Reference Picture
Necktie Design

A Gothic-Lolita character. She was to be a Goth-Loli character from the earliest planning stages. While intended to be Goth-Loli, the early designs did not really have that feeling about them –so I eventually arrived at the final design. However, in order to get the Goth-Loli feeling, I could not help but add quite a few ornaments and accessories –a stage in the design that was especially troublesome. It was also incredibly difficult to draw the twin tails. By the way, those twin tails are a wig that can be removed on the current design. Compared to the other characters, she has the most “doll-like” appearance –with low saturation in her skin tone. Regarding height, she seems slightly taller than the other characters, but this is likely because of the high heels. (Komatsuzaki)

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Original Japanese Image + Transcript (That I wrote up based on the image)

設定画
セレスティア・ルーデンベルク
レース
ボタンは２つずつを４ヶ所で
指輪は先端だけとがった形状に。
カチューシャはこんな容じで。
リボンを逆にも付けて。
＊ピアスは別途資料参照
ネクタイデザイン

ゴスロリキャラ。企画当初からゴスロリで一貫していたキャラです。ゴスロリ自体に興味もあったので初期からそんなにぶれることなく現行のデザインまでたどり着きました。ただ、ゴスロリという時点でしょうがないのですが装飾が特に多いので、後々本当に厄介なキャラでした。ツインテールも描くのが画倒くさいし。ちなみにこれはそのまま外れるウィッグという設定です。他のキャラクターよりもより人形っぽくしようと思い肌の色は大分彩度を下げています。身長が設定上、割と高めなのは他のキャラも同様ですがヒールも含めているためです。（小松崎）

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I intend to upload page 56 next!