Aideen is according to the Legend of Jorvik the girl who brought life to the island.
Not much is known about Aideen, except in "Aideen's Gift and Soul Riding", she was full of nothing but love and spread that love through the island.
Prior to Star Stable Online
In the "Sleeping Widow" quest it turns out that one of many things Aideen has used her light to create the Primeval Trees. Also according to legend when one of the trees had lost its root connections she repaired the damage by using the music of her harp while riding across the sea.
At some point, Aideen came to the Wildwoods and planted the Sentinel Tree.
In the stories, "Aideen's Gift and Soul Riding", long ago when her time had come she sacrificed herself by splitting her soul into two pieces. One went to the horses of the island while the other went to the humans, and when the two came together their love would be stronger than anything.
Star Stable Online
Aideen hasn't been seen in person, but she was mentioned several times by Fripp and the people who worship her or seek her guidance in times of need.
When Lisa and the Player repay their debt for the Sleeping Widow's help, the tree asks for their help in reconnecting with other trees. With Aideen's harp, the duo discovered that the feat was not a legend - but real.
- There is a theory that the descendants of Aideen are the four Soul Riders and that the player is a reincarnation of Aideen herself, due to the player having all of the Soul Rider's powers, just like Aideen.
- According to the Soul Riders, the Lightning Circle represents her judgement, the Moon Circle represents her wisdom, the Star Circle represents her heart and the Sun Circle represents her shield.