A high school student on Earth at the top of his class. Ever since the death of his parents, he has been living together with his older sister, Yuki. He is characterized by his emotionless, stoic demeanor, and is capable of coming up with tactics to defeat the Martian Knights, even within the heat of battle. According to Yuki, he may have developed feelings for Princess Asseylum. While the rest of his squad uses the more armored Kataphract KG-7 Areion, he continues to use the training model KG-6 Sleipnir as his personal unit since it's more maneuverable. After Slaine nearly kills him, it is discovered that part of Asseylum's powers that activate the Aldnoah Drive were transferred to him when he gave her mouth to mouth resuscitation. He now has a bionic eye and a processor specializing in prediction algorithms serving as his temporal cortex.