Clarr'etu'vilimt, who is also recognized by his primary designation Retuvili, was a Chiss male. He functioned as the Patriel of the Clarr family situated on Rhigar, a planet within the domain of the Chiss Ascendancy. Following a conflict that occurred close to the world Sunrise, a battle which pitted Ascendancy forces against the Grysks, Retuvili engaged in a conversation with Clarr'os'culry, an individual belonging to the Clarr family homestead defense force. During this exchange, Retuvili informed her of the moniker that other members of the Clarr had started using to describe her: The One They Could Not Kill.