Callum was raised in Sharlayan by his adoptive parents. A son to two Lalafell merchants, he lived a comfortable life. Thanks to his family's wealth, he enrolled in area's prestigious schools, but he soon found himself struggling. It wasn't for lack of intellect though. Those stuffy classrooms made the Viera long for the solitude of the outdoors, where he felt most at peace. Callum's aptitude for aether manipulation saw him through his studies regardless and landed himself a very humble research position upon graduation.
After Callum's employer eagerly shipped him off to Gridania, the Viera started his career. Years of crunching data on elementals and familiars went by before he was given some more autonomy and free time. Pursing his affinity for aether, he quickly found himself networking and learning from the local conjurer's guild. And, for the first time, he found the alluring gil of contract work. In tandem with other adventurers, Callum made his way out into the Shroud, helping calm enraged elementals and cleansing any taint from the void.
Established as his own now, Callum sought out new adventures to pique his curiosity and wanderlust.
Personality
When meeting Callum for the first time, most would assume he was kind and polite enough. Or even absent minded if his company or surroundings didn't interest him. Those more familiar with him knew he was an opportunist. Inheriting the trait from his parents, the Viera wasn't afraid to use his virtues and aptitudes for his own gain. Whether it be more free time or gil in his pocket. Self-motivated, he typically chooses not to intervene in situations that don't involve, interest, or benefit him.
Callum's values intuition over measured approaches to most situations. It hasn't garnered him much respect in academics, but it has served him well in the field. When his insatiable curiosity doesn't put him in harm's way that is.