Mirror Master

Master Eubulon is a Karshian and now Ventaran and the current Advent Master. He used to work with General Xaviax, who he viewed him as a brother while Xaviax fights, he makes weapons for him. But, now their world is in ruins and needs slaves to rebuild their world, starting with Ventara. He fell ill and almost die until a Ventaran family who helped him recovered and saw the beauty of this world and can't bring himself to enslave the people and destroy it, he tried to reason with his brother-in-arm, but doesn't listen and deemed him a traitor.

He warned the Leaders of Ventara and created 13 Advent Decks for the chosen few to fight Xaviax, they succeed with the help from the people of Earth.

But now, he saw a vision of a war of that is yet to come and send his students to face this threat and notifying Kit Taylor.

Personality:

Wise, calm, tactical, barely shows anger, and patient. He is a war veteran despite making weapons and is a lethal warrior that could put some experienced and skilled fighters to shame and always gives advice to the Riders in case if they're facing trouble or inner conflict. Though after meeting Issei and Rias and the Devils and Fallen, he views them as deluded and arrogant fools that believed that they're the strongest race and looks down on Humanity and their lack of potential of fighting the Supernatural and sees them as war-mongering beings, he refused to make them the Advent Decks in fear that they'll begin a new war.

He only shows kindness and gives respect to those who deserved it, the only ones that he respects are the Angels, Sona Sitri, and Ophis.

He respects Michael, the acting God and archangel and leader of his faction, who sees the growth and potential of Humanity and trusts him to keep the location of Ventara safe and often discussed their ideal world of peace and how to achieve, safe to say, they got along pretty well. He respects Sona Sitri, because he sees potential of her being the next Satan and leader due to her tactical mind and willing to put her pride aside and often give her advice on how to become a great and wise leader and what should they do or not and trusts her to keep the location of Ventara safe. He cares and sees Ophis as a kindred spirit who wishes to find a place to call home.

He likes to help people by giving them advice on how to be successful and living out their life, so he decided to be a guidance councilor at Kuoh Academy and helped them and hates perverts since they came to the school just because of the girls rather than academics.

Relationship:

Kit Taylor: Sees him as the true Red Dragon Emperor, since Kit has experienced and braved the hardships of life and his undying love of his father and the strength and will to fight and protect those he loves.

Hunt: Often telling him to work with the other Riders, but trusts him to get the job done.

Cameron: Keeping his anger and recklessness in check and telling him that charged into battle without a plan is dangerous and suicide and advised him that he needs to fight smart and defeats the opponent with a calm state.

Ian: Agrees with him that hard work and training is its own reward.

Chance: Sees him as bit of a loose cannon and destructive among the Riders, he advised him to stay focus on the enemy, but likes his jokes.

Chase: Trains and spars with him a few times since he admires Chase's admittance to his flaws and wants to catch up with the Riders.

Quinn: Admires his desire to protect and fight along sides his friends to protect those they cared about.

Nolan: Sees him as a second teacher and mentor to the Riders.

Ophis: Cares for her and see her as a kindred spirit of wanting a place called home.