The mysterious protagonist. Before Rachel found him in a dungeon, he lived in solitary without knowing the existence of others nor how to speak. He is called a "non-regular"; one who goes against the laws of the tower. As he ascends the tower he realizes the powers within him.

She became Bam's "light" ever since the day she fell into the dungeon. She fears the night and seeks salvation from the stars, which led to her departure into the tower, where she can reach her "light" at the top of the tower, where the stars are within reach.

Guardian of the first floor of the tower.
In charge of selecting the regulars who will climb the tower.

The girl who wields "The Green April," one of the legendary "13 Month Series" weapons only bestowed upon the princesses by King Jahad. Her lizard-like green skin and tail set her apart, and she is extremely physically capable.

Originally from the Khun family, one of the "10 Families." With strong combat capabilities, he is a strategist whose family's internal struggle for power tempered his strategic abilities and sharp mind.