Yul

Yul is a demi-human boy with a gift for seeing mana who dreamed of climbing the Tower. In the Tutorial his party abandoned him as bait against copper scarecrows; he survived, then helped Cha Yeon-woo by revealing the scarecrows' weakness, and in exchange for safe passage taught Yeon-woo to sense and see mana. When his former teammates, led by Kaen, tried to kill him to hide their misdeeds, Yeon-woo intervened and crippled them, and steered Yul toward Freesia Garden to train as an Enchanter.

Determined despite his timid age, Yul left the Tower promising to return. Years later he is coerced into the organization By The Table under the alias Acacia, blackmailed with a hostage for a decade. Yeon-woo never forgot him: among all who gave him their faith, he considers Yul the very first and honors him as his 'First Believer.'