Gruman

Gruman is a knight of Trinsic in Ultima V.

When the Avatar met him, Gruman spoke of how he kept up the order in Trinsic while waiting for a sign of their true ruler, Lord British. If the Avatar asked Gruman for the mantra of Honor, Gruman would reveal the mantra to be SUMM if the hero had sufficiently high karma.

Gruman would also test the Avatar's Honor on the hero's second visit by asking if the hero's blade had tasted blood. If the Avatar said yes, Gruman asked if it had been for a just and honorable cause. This would cause Gruman to give the mantra of Honor to the Avatar if the hero's karma was sufficient.

Ultima V: Lazarus
In Ultima V: Lazarus he is more fleshed out, actively working for the Resistance, being crucial in helping to undermine the siege of Serpent's Hold.