Eno Adiemus

Eno Adiemus was the accomplished Guild Master of Sanjo Vista's childhood guild. He was the main figure to recognize the latter's exceptional talent outside of his relatives. Nine years ago, he passed away from a crippeling disease and disbanded the guild as his last and final wish. During his life, Eno was a man of great repute. Furthermore, he was an impressively accomplished man. Prior to officially joining a guild, he was a student of the Black Heavenly Way School, an academy for intense study in the martial arts mixed with the magical arts. Through his prodigous talent, at the mere age of 23, he would be named the Grand Master of said fighting style. Eno stood as one of the leading figures preceding that of great mages such as Makarov Dreyar, Neyo Vista, and Guran Doma.

Eno would lead his guild through a number of fierce but justified guild wars; in turn, wittily arbitrate his guild's way out of bothersome legal troubles with the Magic Council. Far and wide, Eno's name was known and feared. Too many of younger ages, he was known as The Great Teacher (す ぐりと ちちゃあ Su Gurito Tichaa) for his wisdom and vast experience. However, Eno was more colloquially known as Eno of the Black Heavens (えの おうふ す ぶらく へえいべんす Eno Oufu Su Buraku Heeibensu) for his fierceness in battle and how the nature of his magic was like judgement from above. He was the one who would train Lloyd Raiz.

Trivia

 * His appearance and, to a lesser extent, magic are based off Issac Netero from Hunter X Hunter.
 * Sanjo comments that Eno was extremely strict at times.

Behind the Scenes
I haven't really expanded on Sanjo's backstory, though I plan to, that's for sure. However, it wouldn't hurt to give his Master an article now. Just another one of those epic old guys, if anything.