Isiris is a Rank A Sword forged from Mithril.
|Fused from 3||Elven King Swords|
|Attack Points (AP)||24|
|Defense Points (DP)||10|
|Sell Price (Sword Coins)||20,000|
Elves watch over Isiris as they perform The Grand Elven Ritual of Nature's Blossom, returning life to the forest and purging it from the demonic corruption.
(The background of the manga is clearly indicated in one of the Special Missions, Nature's Great Ritual, in which you are required to craft Isiris for the sole purpose of performing the ritual.)
The lady in the manga is the one who requests it, the male is Kent, an Elven Hero.