Ambassador Gral was a high-ranking Tellarite official. During his race's conflicts with the Andorians he had participated in military action against them aimed at, "driving those blue devils back into their territory".
In November 2154 he was the head of a delegation to the planetoid Babel to settle a trade dispute with the Andorian Empire, under the auspices of the neutral United Earth. Since Babel was on the far side of Andorian space from Tellar Prime, Gral, his aid Naarg and his delegation were transported by Enterprise NX-01. Gral was full of nothing but complaints during the voyage. For instance, he didn't want the Tellarite dishes Enterprise's Chef prepared, but rather wanted to sample Earth delicacies; this was, however, an anticipated reflection of Tellar's argumentative culture.
His temperament worsened when Enterprise was diverted to rescue the survivors of an attack on the Andorian Imperial Guard warship Kumari. Gral was indignant that the Andorians be on the same ship as him, especially when Kumari commander Thy'lek Shran revealed that the Kumari had been destroyed by a Tellarite warship. Gral denied all knowledge of the attack, leading Shran to try to coerce the information out of him. Fortunately for Gral, Enterprise security forces were able to intervene and separate the squabbling parties. (ENT: "Babel One")
Gral was instrumental in Captain Jonathan Archer's attempt to build a four-way alliance between United Earth, the Andorian Empire, Tellar, and Vulcan to hunt a Romulan drone ship; it was he who represented his people in the effort and provided the necessary communications codes to make the operation a success.