これは今回の収録作品では無いのですが、過去にこういう白鳥礼装のブリュンヒルデや姉妹達（当時のすがた）（非公式）を描いてたよというWEB再録です。Romancia04（終売済み）に収録されておりました。
今回の特装版ステッカー絵の白鳥礼装はRomancia04用にデザインされたものです。

While this piece isn't included in the current collection, I am reposting it online to show that I previously drew Brynhildr and her sisters in these "swan outfits" (depicting their past forms; unofficial designs). It originally appeared in *Romancia04* (now out of print).
The swan outfit design featured on the sticker included with the special edition of this release is the same one originally created for *Romancia04*.