|Name in Japanese||ジークリンデ・バウムガルド|
|Rōmaji Translation||Jīkurinde Baumugarudo|
|Appears in||Anime, Manga|
|Voice Actor (Japanese)||Nana Mizuki|
|Voice Actor (English)||Cherami Leigh|
|Affiliation||ISDA, Lindworm Unit|
Sieglinde Baumgard (ジークリンデ・バウムガルドJīkurinde Baumugarudo?) is the heir to the Baumgard family fortune, and is a child prodigy, having entered college at the age of nine. She is chosen to become a Dragonaut for the Lindworm Unit, and her Dragon partner is Amadeus, who is named after her now-deceased dog. Due to her studies, she has been lonely since her youth, and she considered her dog to be her only friend before it passed away. She and Amadeus defect from the ISDA after it falls under Gillard command.
Despite her seemingly cold attitude, she considers some members of the unit to be her family, and lives in the ISDA facilities. She seems to have feelings for Jin.
In the manga, Sieglinde is transferred from America to the Dragonauts team in Japan.
|e v||Lindworm Unit|
|Members:||Raina Cromwell | Howlingstar | Akira Soya | Machina | Sieglinde Baumgard | Amadeus | Kazuki Tachibana | Keiichi Amagi | Spirytus ||