Yuuki Kagurazaka

Yuuki Kagurazaka (神楽坂優樹) is a Japanese Otherworlder summoned into this world and also used to be the Grandmaster of the Free Guild. He has some connection to Shizue and thus to Rimuru.

Currently he's the Commander of the Eastern Empire's Mixed Corps one of the 3 Heads of the Military.

Appearance
He's considered fairly handsome, with black hair and black eyes. He looks as young as a middle schooler, despite his real age being in the twenties.

Personality
Yuuki is a kind, good-natured, and hardworking person. Always bright and optimistic, Yuuki is an ideal for many adventurers for the good he does but he is also a master in manipulating others if it's to help achieve his goals.

A natural born genius Yuuki was satisfied with his life on earth. he had loving parents and plenty of friends, But after an overworked truck driver fell asleep at the wheel and crashed into his parents car killing them both he fell into despair. When the courts ruled the driver innocent Yuuki discovered the unreasonableness and flaws of society. He initially wanted to take revenge and tear it all down but couldn't bring himself to inconvenience so many innocent people in the process. Instead he realized that he would have to change society one step at a time by becoming a politician and gaining like minded friends and allies who would help him achieve a more fair society, But before he could even finalize his plans he was summoned to the otherworld. With a underdeveloped world in front of him and with his ally in the form of Kagali he's determined the rule the world and develop it into a peaceful and fair world for everybody, A true happily ever after.

Background
Yuuki was summoned into this world; 10 years before the main story by the former demon lord Kazaream. He quickly learned to adapt and become an adventurer in the then called The Society of Adventurers. It was there he met his teacher Shizue Izawa and fellow otherworlder Hinata Sakaguchi.[1] Yuuki then rebuilt the Society of Adventurers into the current Free Guild changing its structure and monster ranking system. Thanks to his effort in creating the current Free Guild, he gained the position of Grand Master and has been working to better the world ever since.

Yuuki is also the leader of a group known as Cerberus, whose ultimate goal is the domination of the world; as such, there is little to no information about Cerberus, because Yuuki is an extremely cautious and smart guy. The majority of their actions had been performed from the shadows. Yuuki was the one to tip Hinata into attacking Rimuru, he's also the one who gave info to entice Farmus to start a war with Tempest.

Kagali
Yuuki's Summoner and irreplaceable precious comrade who acts as his secretary and helps shape his plans.

They shared a body for 10 years before Yuuki managed to get his hands on a Sarion homunculus.

Moderate Harlequin Alliance
Yuuki's precious friends and comrades whom he has 100% trust in.

Clayman
Yuuki regrets not being able to save Clayman and saw him as an ally whom was extremely beneficial to his plans and mourns him with the rest of the clown troupe.

Shizue Izawa
Yuuki thinks highly of his teacher Shizu and was initially angry at the fact that Rimuru murdered her.

Yuuki was the one who got her up to speed on the current state of affairs in Japan. Shizu's knowledge of the catchphrase "I'm not a bad slime, Slurp!" came from him.

Hinata Sakaguchi
Yuuki would sometimes meet with Hinata and exchange intelligence with each other.[1]

Students of Class S (Kenya, Ryota, Alice, Chloe, and Gale)
Yuuki pities the otherworlder students of Class S and wishes he could help them in any way.

Rimuru Tempest
Yuuki is grateful to Rimuru for letting him read manga; saving the kids of class S; and bringing peace to the Jura Forest. Yuuki claims that he would back Rimuru if there was a conflict against the Church. As the series progresses, Yuuki slowly addresses Rimuru as a very serious threat to his plans.[2]

Guy Crimson
Yuuki acknowledges his strength but his desire to defeat him hasn't waned one bit. Loosely operating under Guy as his pawn to crush the Eastern Empire.

Unique Skills
Greed:(Former) Ability to dominate anyone who's desire is less then the desire of the owner.

Creator: A special energy that can change form into whatever Yuuki requires for the situation limited only by his imagination and energy. An extremely versatile ability that created Anti-Skill and evolved Yuuki from a regular human into a Saint in a matter of seconds. It can also analyze other people's Unique Skills, but only if they're being used in his presence.


 * Anti-Skill: Invalidates skills, abilities or magic. This however, does not work on secondary effects, such as burn of oxygen due to fire magic. It also cannot counteract two or more properties when it comes to magic and skill fusion.

Ultimate skills:
Mammon

Trivia

 * Yuuki is one of the characters who had been changed the most between the Web Novel and the Light Novel. His entire character has been reworked and his motivations are completely different, to the point that his actual "role in the story" might end up a completely different one in the Light Novel compared to the Web Novel.