Sometime before the permafrost of Elior Forest, Arch was chosen to become the Guardian of Elior Forest.

Later, when Elior Forest got attacked by Pandora, Regulus Corneas and the Kurohebi, Arch was ordered to bring Emilia to safety, however the two of them got surrounded by the Kurohebi and so, he sacrificed himself to save Emilia from the Kurohebi.