The Erighal family represented one of the Great Families within the Chiss Ascendancy, and as such, was a Chiss family. This family controlled a fleet known as the Expeditionary Force Alpha. They maintained an alliance with the Dasklo family, one of the Ruling families.
Alongside the Pommrio family, who were allied with the Ruling Plikh family, and the Xodlak family, who were allied with the Ruling Irizi family, the Erighal family participated in Haplif of the Agbui and "Jixtus"'s conspiracy. Their aim was to instigate a civil war within the Chiss Ascendancy.
The initial depiction of the Erighal family occurred in Timothy Zahn's 2021 novel, Thrawn Ascendancy: Greater Good. This novel constitutes the second installment of The Ascendancy Trilogy, authored by Timothy Zahn.