Age: 14-21 (physical), 200+ (mental)
Birthdate: December 25th

Lucas is a magician. One of his many abilities is to transfigure his form between the appearance of a child and his original form.

(Child) Short black hair, large red eyes, young teen build, short
(Adult/Original) Long knee length black hair, narrow red eyes, young adult build, tall

Lucas is known as the Great Magician of the Black Tower. He is sought by the rich and talented dreamers as a teacher. He prides himself as the greatest magician alive. Currently, he is an imperial wizard.

He is Athanasia's closest childhood friend and the one she trusts the most. The first time they met, Lucas tried to kill her using magical bubbles that could suffocate whoever inhaled them. However, his plan failed. He continued to meet Athy. Not only did they develop a deep bond of friendship, but Lucas also ended up as Athanasia's personal royal magician.

(Source: Naver Blog, Who Made Me a Princess Manwha)