Upon his acceptance into the Children of Danu, Ruaidrí believed and depended more on direct action within the cult rather than on the cult's religious practices and rituals. Ruaidrí considered that the spirits would be more impressed with his undertakings for the cult. Ruaidrí followed his own motto: "Get what you need by whatever means necessary and thank the spirits afterwards." Ruaidrí's actions and results were highly recognized by the Children of Danu and the cult gave him the responsibility of amassing the resources needed for their final plans.
The Viking jarlskona Eivor Varinsdottir came across the cryptomn, The Deer, when she killed The Cursed alongside Ciara ingen Medba and recovered a clue from The Cursed's personal effects. After recovering The Cursed's amber shard, Eivor looked over the clue, which was a letter to The Cursed, detailing The Deer's activities and presence at the trading post Ardmel. From Sétnae's clue, Eivor traveled to Ardmel, in eastern Ulster, and investigated the area for any more clues. Probing the area, Eivor found a note on top of supplies outside the trading post. The note revealed the identity of The Deer, Ruaidrí, and his location happened to be among the villagers of Inch Lough Neagh. Ruaidrí was stated to be extorting the villagers to fight against Flann Sinna in any way possible.
Eivor traveled to the village of Inch Lough Neagh and searched for Ruaidrí. Within a inner stronghold, Ruaidrí was spotted by Eivor as he was overseering his plans in the area. Eivor became nearer to Ruaidrí and assassinated him within the area. From Ruaidrí's personal effects, Eivor retrieved his amber shard and another clue involving the members, "The Seed" and "The Spider."
Behind the scenes
- Ruaidrí is the Old Irish form of the name Ruaidhrí, meaning "red king" from Old Irish rúad "red" combined with rí "king". It was notably the name of an Irish king, who reigned during the late 12th century.
- Ruaidrí's beliefs coincidentally compares with the Niccolò Machiavelli's phrase, "The ends justifies the means."