|This article belongs to the Classic Continuity|
Magister Coronach is the captain of the Plumbers' Academy.
Coronach is a green-skinned humanoid with fish-like fins on his head. He has a small black beard and wears a typical Plumber Suit.
Coronach takes great pride in his cadets and was not willing for them to be in the line of fire as they are not ready for it and they are rookies as he's greatly concerned of their safety.
Coronach doesn't want his academy to be turned into a war zone, considering it to be a place of learning.
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Coronach first appeared in The Enemy of My Enemy. He became annoyed about Ben bringing Argit to the academy in order to lure Ultimate Kevin there. After speaking with Ben and Gwen in his office, he helped Ben to stop Ultimate Kevin. He also knows what goes on within the academy, as he knew Argit had assaulted two of his cadets and appears quite knowledgeable about the fourteen warrants for Argit's arrest, so in the end he ordered the Vreedle Brothers to lock him up.
Ben 10: Ultimate Alien
- The Enemy of My Enemy (first appearance)
- Coronach is very similar to the Plumber from Ultimate Aggregor, except that he has more wrinkles, lighter green skin and hair.
- Coronach knows Max Tennyson and has great respect for him.