Zouken Matou

Zouken Matou is the ancient patriarch of the Matou lineage, a sorcerer who holds a vast collection of forbidden magical knowledge. He serves as the grandfather to Shinji and Sakura, though his mentorship is defined by cruelty and rigorous discipline. While he views Shinji as a complete failure of a magus, he recognizes a profound potential within Sakura, using manipulative influence over her life to sustain the family's dark legacy.