This character is the primary protagonist of Fantasian, Leo suffers from amnesia, and his quest for memories constitutes a significant portion of Part 1 and 2.

He wields a sword and is one of only two characters able to Steal items from enemies, the other being Ez.

As the main character, he is the first to obtain various improvements such as better weapons, Divine Artifacts, second gem slots and Tension Skills, although Ez is also a contender for first place in this case.

All through the game, Morrigan the Butterfly tries to imply that she and Leo have a past, but it was never confirmed by Leo himself.

Leo is also known to collect various materials, artifacts, locked treasure chests, and more from the various realms, most notably the Machine Realm. This interest is likely because his father, Bernard, was also an explorer who traveled to many realms for his research.

He is also known to secure his collection with overkill security measures, as stated by party members who criticize him while he tries to navigate through them. His state of amnesia further complicates these efforts.