Asap Suzuki
Voiced by: Jun Fukuyama
A student attending college in Tokyo, he is dragged into the underground world of Byston Well through a chance encounter with Lyukusu and the Wings of Rean.
- But Not Too Foreign: His mother is Japanese, whilst his father is American.
- Heroic Bastard: Being born of an affair between his mother Tokiko and his father Alex doesn't stop him from being heroic.
- Nom de Mom: Instead of being named Asap Gorem, he uses his mom's surname Suzuki, possibly due his own issues with his dad.
- Phenotype Stereotype: The blond hair he inherited from his American father is proof of him being biracial.
- Sympathy for the Devil: He sees flashes of World War 2 when traveling between worlds thanks to the Wings of Rean. Seeing how horrible the war was allows him to understand how Sakomizu feels, and even as he becomes more violent he still tries to reason with him.
Lyukusu Sakomizu
Voiced by: Yu Shimamura
Princess of the Byston Well's Houjou nation, she steals the Wings of Rean in rebellion against her father, which leads her to meeting Asap in the surface world.
- Ace Custom: The Gim Genen she is seen piloting has highlights that are green instead of the usual turquoise.
- But Not Too Foreign: She was born and raised in Byston Well, but her father is Japanese.
- Rebellious Princess: She goes against her father to show how she disapproves of his ambition.
- Spell My Name With An S: Her given name can also be romanized as "Luxe, Ryuks, Ryukus," ect.
Elebos
Voiced by: Yui Horie
A Mi Ferario ordered by Jacoba to assist Asap, she rides alongside him in his Aura Battler.
Shinjiro Sakomizu
Voiced by: Rikiya Koyama
King of the Houjou Nation, he was originally a fighter plane pilot from World War 2-era Japan who fell into Byston Well. He seeks to one day return to his home nation, and meeting Asap gives him hope that he can do just that.
- Advice Backfire: The Wings of Rean showed him visions of how Japan sufferred during World War 2, presumably so he would stop it from happening again. Instead, he believes that the modern Japan has forgotten its past and becomes even more determined to wipe the slate clean.
- Big Bad: The main conflict of the series is caused by his desire to return to Japan and defeat America.
- Fallen Hero: In the past, he was seen as a hero who unified Byston Well and ended its wars. Even before that, he was responsible for stopping the third atom bomb that would have been dropped on Kokura. Now, he was not only willing to slaughter innocents to go back home, but also to burn Japan to the ground just to purge it from western influence.
- He Who Fights Monsters: When Japan was an enemy of the USA, he gave his all to protect his country. When he discovers Japan not only lost the war, but allied with the Americans and accepted their culture and influence, he decides modern Japan is an enemy too, culminating in him trying to drop a new nuke.
- No True Scotsman:: He is patriotic man who would give his life for the Japanese people. Unfortunately, Japan has changed a lot since his time, and in ways that don't follow the ideals of imperial soldiers like him. He is so disgusted by what he sees as Japan abandoning its values that he decides to destroy modern Tokyo.
- Politically Incorrect Villain: He was a soldier during World War 2, so this shouldn't be a surprise. In particular, he hates America, and also how "Westernized" Japan became after losing the war.
- Samurai: He certainly styles himself as one, which also shows in the design of his Oukaou.
Codorre Sakomizu
Voiced by: Marika Hayashi
Wife of King Sakomizu and Lyukusu's stepmother, she is often seen as less than happy with her family.
- Evil Matriarch: She hates her husband and stepdaughter, and is planning to stab the former in the back.
- Expy: Notably, while most characters in this work don't personally resemble the ones from Aura Battler Dunbine much even if they have similar narrative roles, she is an almost perfect copy of Luuza Luft.
- Fantastic Racism: She has little to no real love for her surfacer husband, and this also applies to her stepdaughter that inherited his blood.
Kotto Hin
Voiced by: Shin-ichiro Miki
A general of the Houjou nation, he is of the same clan as Codorre.
- Cool Ship: He serves as captain of one, the Fugaku.
- Number Two: Serves as Codorre's go-to guy when she wants something done.
Kasumi Sugai
Voiced by: Keiji Hirai
A general of the Houjou clan.
Murassa Men
Voiced by: Mayumi Asano
A general of the Houjou clan.
Amalgam Rudol
Voiced by: Yutaka Nagano
A former comrade of Sakomizu, he now leads a Rebel Army against him.
- Ace Custom: His Gim Genen's has highlights are orange-red.
- Old Soldier: Getting on in the years won't stop him from fighting in an Aura Battler.
- We Used to Be Friends: While he once called Sakomizu his friend, he cannot stand by and watch him misuse his power.
Jacoba Aon
Voiced by: Yuko Kaida
Rouri Yahan
Voiced by: Hiroshi Tsuchida
One of Asap's roommates, he ends up joining Sakomizu's army for the chance to pilot an Aura Battler.
- Face–Heel Turn: He joins up with the Houjou army, which puts him in direct conflict with Asap.
- What Happened to the Mouse?: The anime doesn't specify what happens to him after Asap defeats him.
Heiji Kanamoto
Voiced by: Shingo Tanabe
Another of Asap's roommates, he joins Rouri piloting Aura Battlers for Houjou.
- Face–Heel Turn: Like Rouri, he ends up fighting Asap as part of the Houjou army.
- What Happened to the Mouse?: The anime doesn't specify what happens to him after Asap defeats him.
Alex Gorem
Voiced by: Tōru Ōkawa
An American colonel stationed in Japan, he is Asap's father, but the two have not spoken in a while.
- Phenotype Stereotype: You can tell he's American from his blond hair.
- Took the Wife's Name: He introduces himself to Lyukusu as "Alex Suzuki," as proof to his son Asap that he's coming to Japan to live with him and his mother Tokiko.