|Name in Japanese||オトヒメ|
|Voice Actor (Japanese)||Ryōko Ono|
|Voice Actor (English)||Luci Christian|
|Affiliation||ISDA, Vritra Unit|
Otohime (オトヒメ?) is Itsuki's Dragon partner. She bears a striking resemblance to Itsuki, with the only differences being the color of their hair, their clothing, and that Itsuki has markings under her eyes. Yuuya addresses both of them as "nee-san" which is Japanese for 'older sister'.