Kralis na Then was a male Triexian who died in 2310.

In March of 2380, a Triexian using Kralis' name provided Bacco Administration speechwriter Bey Toh with information relating to a secret and illegal judicial order issued by then-Supreme Magisterial Authority Artrin na Yel in 2372. This information led to the resignation of Artrin from the Federation Council. (ST novel: Articles of the Federation)