|Japanese Name||Kasutōru (カストール)|
|Voice Actor||Hideo Ishikawa|
|Relationships|| Miguel (Brother)
- "The second son of the Rand Family. He became an officer of the Esgares Empire, thinking that there may be an opportunity for him to become successful. His dream is to someday call his brother and sister to live with him."
Castor has fair skin, blue hair, and lighter blue eyes.