Filial Devotion

Filial Devotion was a Forerunner who lived during the time of the Forerunner-Flood War. They wrote a letter to their father which was visible on the seventh Terminal that John-117 encountered on Installation 00.

Trivia

 * Filial Devotion can be translated into "dedication to one's son or daughter" which could possibly reflect on the relationship Filial Devotion's father had with his child.