Marina discovered her magical powers when she was young, and she's been learning how to cast spells ever since. Her goal is to become a master wizard, so she's always eager to test her magic against enemies.
Marina's job on an adventuring team is to cast her spells to support her teammates and help them deal with the monsters.
Marina is not a strong combatant but is very good at casting spells. This means that it's probably smart for her to stay behind the front lines and use her spells.