__Height:__ 172 cm (Debut); 180 cm (Chapter 1268)

Klein Moretti is the main protagonist of Lord of Mysteries. "He" is a Beyonder and God of the Fool Pathway. "He" is the mysterious leader of the Tarot Club known as The Fool and a Transmigrator who comes from the modern era.

Klein Moretti has exhibited a cautious and good-natured personality. "He" is humorous, polite, mature, and gentlemanly. Fundamentally a lover of justice, "He" will not hesitate to do what is right even at a personal cost. As an ordinary citizen of Earth who transmigrated suddenly into a dangerous world, Klein was naturally a bit fearful and indecisive at first. But during the short span of time following "His" transmigration, Klein experienced a lot of dangerous or tragic situations. "He" even became the leader of a secret organization, killed numerous monsters (even some humans), and finally evolved into a Beyonder surpassing the boundaries of a human being (aka Saint, Angel). Klein indeed became much more ruthless, confident, and mysterious compared to "His" former mentality. In fact, Klein Moretti became gradually incomparable from the Zhou Mingrui of Earth. "His" experiences notwithstanding, Klein still preserves the core of his personality as one who is cautious, yet will uphold justice where necessary and not involve or target the innocent.

The current transmigrator is like the original Klein, "He" is interested in history and cares about his appearance. Klein immediately became a sophisticated and socialite person known for "His" elegant style as soon as "He" could afford the cost of the different clothes and accessories. Together with his humorous disposition and status as a Beyonder of the Fool Pathway, "He" gave off an amiable and mysterious aura. As for the interest in the history of the transmigrator, it can be explained in a lot of ways (remnant memories of the history graduate; the natural curiosity of a transmigrator; learning more to survive; Pathway related to mysteries, etc.).

Moreover, it is worth noting that Klein Moretti had a talent for acting even before becoming a Beyonder treading the Fool Pathway. It was first seen when "He" had the reflex of assuming the attitude of a mystical and powerful entity called The Fool during "his" first trip in The Gray Fog. Klein then became much better at posing and faking identities as "He" progressed in the sequences of his Pathway with the Acting Method.

With the rising tide of steam power and machinery, who can come close to being a Beyonder? Shrouded in the fog of history and darkness, who or what is the lurking evil that murmurs into our ears?
 
Waking up to be faced with a string of mysteries, Zhou Mingrui finds himself reincarnated as Klein Moretti in an alternate Victorian era world where he sees a world filled with machinery, cannons, dreadnoughts, airships, difference machines, as well as Potions, Divination, Hexes, Tarot Cards, Sealed Artifacts…
 
The Light continues to shine but mystery has never gone far. Follow Klein as he finds himself entangled with the Churches of the world—both orthodox and unorthodox—while he slowly develops newfound powers thanks to the Beyonder potions.
 
Like the corresponding tarot card, The Fool, which is numbered 0—a number of unlimited potential—this is the legend of "The Fool." (Source: Webnovel)

In a Victorian world of steam, dreadnoughts, and occult horrors, Zhou Mingrui awakens as Klein Moretti. He walks a razor’s edge between light and darkness, entangled with warring Churches. This is the legend of unlimited potential…and unspeakable danger.
 
(Source: Crunchyroll)

Zhou Mingrui possessed and reborn Klein Moretti who committed suicide due to the sealed artifact "Antigonus Family Notes". Zhou Mingrui once again held a "Transfer Ceremony" in order to return to Earth, but accidentally entered a mysterious gray fog space. During this process, he inadvertently pulled the consciousnesses of Audrey Hall and Alger Wilson into the gray fog space. In order to dominate the conversation and pretend to be a hidden existence in recovery, Mr. Fool, who calls himself Mr. Fool, has since embarked on a magnificent legend of becoming a god. (Source: Tencent, translated)