Leviathan was always a sea sepant, the only mention of it being a whale is the kings james bible and a real prehistoric whale named after it called livyatan. Otherwise, every literature has leviathan as a sea serpent.
Use your magic, Yuri! Ignore the annoying naysayers! What's the point of becoming a sage and then not using your magic, huh? Think about it for a moment.
@Liquidxlax If she never uses her attack magic, it's guaranteed she never learns to properly control them and choose them wisely for the right occasion. So, if a situation arises where she absolutely must use one to save her life, she might make a mistake due to her inexperience. You'd think those knights would understand at least that much.