Catherine is a character from Fire Emblem: Three Houses. She teaches at the Officer's Academy and is one of the Knights of Seiros. As an instructor at the Academy he offers lessons in Swords and Fighting.
Catherine comes from the earlier Greek name Hekaterine, which derives from hekateros "each of the two". Originated from the goddess Hecate; it's related to Greek aikia "torture"; or a Coptic name meaning "my consecration of your name".
In the early Christian era it became associated with Greek katharos "pure", and the Latin spelling was changed from Katerina to Katharina to reflect this. The name was borne by a semi-legendary 4th-century saint and martyr, Saint Catherine, from Alexandria who was tortured on a spiked wheel