- Localized Name: Jude Mathis
- JP Romanized: Jude Mathis
- JP: ジュード・マティス (Judo Matisu)
- Gender: Male
- Age: 16 years old
- Height: 163 cm
- Designed by: Kosuke Fujishima
- Race: Human
- Weapon: Gauntlets
- Voice Actor:
- JP: Tsubasa Yonaga
- English: Sam Riegel
After the events of Tales of Xillia, Jude Mathis devotes himself to researching spyrite technology in the hopes of finding a balance between Rieze Maxia's spirit artes and Elympios's spyrix technology. He is now a researcher working with Alvin's cousin, Balan. However, he has encountered several hurdles in his research and is now close to broke. He initially meets Ludger while going to the Trigleph train station as a favor for Leia. When the ceremonial train he is riding is hijacked, Jude teams up with Ludger to retake the train. It ends up crashing and they are all severely injured. When Ludger takes on an enormous debt to cover their medical bills, Jude feels that he owes it to him to come along on his journey.
A self-acknowledged "do-gooder," Jude has trouble ignoring anyone who needs his help. His character chapters are largely focused on his spyrite research and his attempts to balance the need to progress in order to benefit humanity with his desire to do so without inhumane treatment of spirits or spyrites.
