Lux Arcadia

Lux Arcadia (ルクス・アーカディア Rukusu Ākadia), also known as the Weakest Undefeated or the Black Hero, is the main male protagonist of Saijaku Muhai no Bahamut.

He was a prince of the Old Arcadia Empire, but helped overthrow it in a rebellion five years ago. He later met with the princess of the New Kingdom Atismata, Lisesharte, when he accidentally broke into the bathroom of the girl's dormitory. He is the user of the Divine Drag-Ride Bahamut.

Personality
Lux has a very kind personality, willing to help anyone in need. Lux has proven to have a strong moral code, even trying to avoid killing his enemies during the revolt. According to Magialca Zen Vanfrick, while Lux's way can be considered the harder method, it has allowed him to gain more allies then what most people would expect from someone of his position, displaying great charisma.

Most of the time, Lux is very shy around girls his age. This is not helped by how most of the girls at the academy try to get closer to Lux because he's the only boy there and how they try to make him do "odd jobs" for them.

However, Lux can become very serious, calm and calculating when he wants to be. Krulcifer once mentioned that when angered enough, Lux can become aggressive and destructive in battle. He has likewise displayed great foresight and wisdom, which often surprises most people given how he usually behaves.

As his sister mentioned, Lux also has the trait that makes him stubborn. When he wants to help someone, he does it, regardless of the situation. He admits he can be quite a showoff. This has caused Lux to be very reckless in dangerous situations as he will push his body past its limits to reach the victory he wishes for, one where no one dies.

Lux has shown to be very skilled at hiding his true strength. For five years since the fall of the Old Empire, Lux has managed to prevent most people from realizing that he was the Black Hero by creating the image that all he could do was defend in battle, making him appear weaker than he actually is, while also getting stronger at the same time.