Regis is a young noble. His caretaker is his companion Seira. Regis has high regard for elegance and is extremely prideful. He values manners and honor primarily. He and Seira appeared to investigate the possible appearance of an infected/mutant amongst the humans.  Regis is fairly short and when Ikhan first sees him, he becomes excited at having someone the same size as him. Ikhan has always felt self-conscious, but Regis does not feel bothered by his height.   ~! His grandfather is an old well-respected noble called Gejutel and also the current leader of the Landegre clan. It is revealed Regis father died in the rebellion and betrayal against the Lord.!~  He does not get along well M-21, especially when they first met because he has a strong dislike of modified humans who he thinks sold their humanity for power. However, once he sees how M-21 sacrifices himself for the children he reconsiders his opinion of him, but not enough to fix their "sensitive" relationship.  Against his will and better judgment, Regis gets recruited into Tao's group, Rai's Knights, as RK No. 3.

When Cadis Etrama Di Raizel or Rai, as he is known, awakens after 820 years, he discovers a modern world he simply doesn't understand. Once an extremely powerful member of the Nobles, a race of nearly immortal and powerful creatures, Rai decides to start again as a high school student at Ye Ran High School, founded by his former servant Frankenstein, who is somehow still alive after all these centuries. Frankenstein’s goal—to help his powerful, vampire-like master learn about human life and culture as he protects him from the modern forces Rai cannot fathom.
 
Rai's somewhat peaceful new life is about to be disturbed by The Union, a secret organization interested in using his powers to further their own malicious goals. 
 
When past clashes with present in this innovative take on familiar dark fantasy tropes, Rai must do everything in his power to ensure the Union doesn’t control his destiny, and that he can continue to integrate himself into this new, confusing modern world...
 
(Source: WEBTOON Unscrolled)

For 820 years he had slumbered with no knowledge of mankind's advancement and scientific progress. The land which he once knew has become an unfamiliar place with new technology, attitudes, and lifestyles. Upon awakening, Cadis Etrama Di Raizel (aka Rai), seeks to familiarize himself with this era. He locates a loyal servant of his, Frankenstein, who is currently the principal of a South Korean High School. Rai decides that this school is the perfect place to help him learn about the modern world, enrolls, and begins associating with a group of good-natured students in order to 'blend in'. But this new world is no safer than the old; and the dignified, bewildered, technologically inept Rai finds himself embroiled in adventures both ridiculous and dangerous.

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Yago Machado is an actor, voice actor and director of voice acting. Famously known as the Brazillian voice from the character Darwin Watterson from animated sitcom The Amazing World of Gumball.

**Javier Ricardo Bautista Valdez** is a Mexican voice actor known for being the Latin American Spanish voice of James Diamond in _Big Time Rush_, Michelangelo in _Teenage Mutant Ninja Turtles_ and Noel Kahn in _Pretty Little Liars_. 
He is the recurring dub voice of Nick Jonas and James Maslow.

Regis K. Landegre