Fritz is a student excelling at both military and literary arts who enrolled at Thors Military Academy alongside Crown Prince Cedric Reise Arnor. He is a courteous and calm person, reaching fifth place in the combined periodic examination of the main and branch campus. He acknowledges Kurt Vander as his rival and somehow gets along Ash Carbide.
Following the events of the Great Twilight, Fritz lost sight of his reasons to fight. After the battle against united Class VII at the Thors Branch Campus, he decides to go separate ways from Cedric. In the final battle, he fights alongside Thors alumni.
When the main and branch campus form a joint battlefront during the Twilight's finale, the students were tasked with gathering materials for medicines. Fritz was teamed up with branch campus student Kairi. Their search for Zemuria Moss was interrupted when a Magic Knight approached them. With the unexpected help from Class VII, Fritz made sure Kairi got out of the range of fire. Fritz apologises for his missteps, but Kairi insists that they were able to defeat the opponent because Fritz was with here him and doesn't mind that Fritz judged as him incapable of his appearance. Fritz admired the strength of the branch campus students even more thanks to Kairi's heartfelt words.