A mysterious, feminine-looking ninjutsu practitioner who wandered aimlessly from the eastern kingdom of Ashihara*. He is a docile, gentle person and a bit of an introvert, as a result of his androgynous appearance attracting lots of unwanted attention. In TV Tropes terms, he's a Drifter.

Some people mention the term "Oriental Blue" whenever events relevant to his stories happen, a nod to his vibrant blue eyes and the fact that most of the time, the best solution for all the troubles is letting go of his bashful pretty boy persona and slicing up some baddies. He also has his personal code of honor - He doesn't fight for personal gain or fame, doesn't kill indiscriminately and only stays for long in places that can offer him inner peace.

Little is known about his past, except that he was raised in the Eastern lands, and trained in a martial arts school named Kurenai-Ryu. (His full name, Christopher Falcon, is also a nod to Ryu Hayabusa - both characters are badass ninjas on their own and named after the same animal; Hayabusa is the japanese term for "Peregrine Falcon") He was forced to flee from the dojo as it fell in disgrace, but he made a vow of honoring the teachings of his benefactors, even though some ghosts from his past come to haunt him from time to time.

His drifting brings him to Rafflesia Kingdom, where he senses great danger looming on the realm, and a noblewoman who's a central player on this chapter of his history, is the key to understanding the reasons for why the shadow is lurking where the wind blows...

*Ashihara, or "Ashihara no Nakatsu no Kuni", is the Japanese umbrella term for the mythological version of Japan. It's similar to Tolkien's "Middle Earth" or the Norse mythos of "Midgard" or "Realm of Men".

An alchemist that pursued the secrets of the Gate of Nemesis as a mean to stop aging. An incident known as "Days of the dark clouds", of which monsters appeared in the land of Ashihara, leading to fierce battles between Chris Falcon and monsters (Called Youkai by the eastern islands inhabitors) three months prior to his arrival in Rafflesia.

A few years ago, he was good friends with king Ozias, and both studied about the Gate of Nemesis. Ozias nurtured the idea of meeting a descendant of Maya, a powerful Sage who once sealed the Gate of Nemesis, which could lead the world to destruction as it summoned monsters from a place called "The realm of the black stone".

Frost arranged a meeting with one of Maya's descendants, a Rafflesian scholar that developed a system of windmills to make good use of winds that constantly blew on the region. This scholar agreed to meet Ozias, and Frost actively helped him on achieving his goal. One tragic day however, an attempt to brew a love potion ended up in an accident. The scholar woman drank Frost's love potion, which had two ingredients missing, and she ended up losing her memory for a few days, and with the scholar being totally upset at the two.

While a second attempt did work, however, Ozias grew more and more Jealous of Adam due to the knowledge of the love potion, bordering on Paranoia. Fearing that his friend may have been harboring secret feelings towards the woman of his dreams, he decided to sneak in the Frost Manor and steal all of the love potion bottles for himself.

Ozias, however, was caught on the spot, and claimed that Adam would use the potions to seduce the scholar and get more information on the Gate of Nemesis, thus ending his quest for love in a tragic way. Ozias destroyed most of Adam's work tools in a fit of rage and tried to kill him, but failed.

Adam went into hiding, researching on the Gate of Nemesis by himself, and as he found a way of harnessing its power, he was infected with Vampirism, turning himself into a Nosferatu-like creature that sworn revenge on the king, swearing to make the entire kingdom into a part of the Realm of the Black Stone, by force, if necessary.