As the Avatar learned in Ultima VII, Foranamo hated humans and was even forbidden from entering the human side of Vesper. Due to his hatred, he spent his time drinking heavily with his brother Anmanivas, who shared in the same hatred of humans.
Revealing to be the Avatar will make Foranamo furious, and he tries to kill the "False Prophet" whom he thinks has ruined his people. After Foranamo's death, Ansikart will bemoan that something like this was bound to happen.
Foranamo translates to "Strong Hatred" in Gargish.