Saint Maera (聖戦士マイラ Seisenshi Maira, lit. Holy Warrior Maira) is a character who appears in the background story of Fire Emblem: Genealogy of the Holy War. He was the younger brother of Emperor Galle, and was secretly hailed as a savior to the oppressed citizens of the Loptyrian Empire. Maera, despite being a descendant of Galle I, was a good person who stood against the brutal practices of the Loptyrian Empire and protected the citizens from their cruel practices.
Maera and his priestly followers attempted to stop discrimination by uniting Loptyr with the old gods of the old Kingdom of Gran, placing Loptyr amongst the higher gods of the fallen Kingdom's religious canon. This ultimately resulted in a major rebellion staged against the Loptyrian Empire, with all the involved rebels eventually being defeated and exiled.
Maera's followers continued to aid the citizens of the Loptyrian Empire, trying their best to protect them from harm. The future Crusader Blaggi and others were later saved from perpetual sacrifices and murders and subsequently raised by Maera's followers. After Loptyr and the Empire were eventually defeated by the Twelve Crusaders following the Miracle of Darna, Blaggi erected the Blaggi Tower to mourn and honor Maera and his followers, who died to protect the people.
Maera is essentially the link to Loptyr holy blood from the past, which continued to be passed on, largely in secret, to his future descendants, causing a majority of them to seek refuge in the Spirit Forest for fear of persecution and reprisal. His known descendants are Cigyun, Arvis, Deirdre, Seliph, Julius, Julia, and Saias.