VA: Yoshimasa Hosoya (Japanese), Troy Baker (English)

Alias: Kamen Rider Juuga, Dr. Wolfe 

Motif: Ten Animals, Kamen Rider Kuuga Ultimate Form

Rider Type: Hero/Anti-Hero, Protagonist

Species: Human

Occupation: Scientist

Personality

Aiden is a cool-headed scientist who is quick-witted on handling a dire situation. He is also a big fan of Kamen Riders, particularly the Riders of the Heisei Era.

Toward the demons he is contracted to, he is very kind and friendly toward them despite knowing their demonic nature. It is this kindness that allowed the demons to help him as Kamen Rider Juuga and becomes very close to him as result.

Powers

Hybrid Physiology: Due to receiving a heart transplant infused with Giff's DNA, Aiden can safely transform into a Kamen Rider using the Vistamp system. Additionally, this also allows him to use some of Giff's powers as well.

Demonic Control: Despite not having an inner demon himself, he can still control the demons contracted to him, partially due to having portion of Giff's powers.

Forms

Kamen Rider Juuga (main form)

"Juuga!"

"Rex! Megalodon! Eagle! Mammoth! Ptera! Lion! Jackal! Kong! Mantis! Brachio!"

"Scramble! Ten Genomes! Ambitiously Strong! Burst, Roar, Transcend! Kamen Rider Juuga! Go Over!"

"Impulse/Crash Genome Edge/Amazing Finish!"

Equipment

Juuga Driver

Juuga Vistamp

Demon Contracts

Aiden is contracted to seven demons, three of them belonging to Overlords while the four being members of the Seven Deadly Sins.

Carmilla Carmine

An Overlord who is a weapons dealer who killed an Exorcist angel to protect her daughters, Clara and Odette. She and her daughters salvage angelic weapons after Exterminations to be sold in Hell.

Zestial

One of the Overlords of Hell known for being the oldest demon in Hell.

Rosie

One of the Overlords of Hell selling treats for cannibals.

Stolas

A owl demon and the Goetia prince of Hell. He holds a grimoire that allows demons to travel to Earth.

Beelzebub

A bee-fox demon and one of the Seven Deadly Sins representing the Sin of Gluttony.

Asmodeus

A rooster demon who is one of the Seven Deadly Sins representing the Sin of Lust. Also nicknamed Ozzie and owns many Robo-Fizzes, a robot copies of his boyfriend Fizzarolli.

Satan

A dragon demon who is one of the Seven Deadly Sins representing the Sin of Wrath. He is also the de facto leader of Hell's judicial system due to Lucifer's absence.