Tanislav
Roirr's father in Ravenloss tradition
The Codex Arachna tells of Tanislav's desperate attempt to save his dying son Roirr. He buys instructions for an elixir that consumes life and sacrifices his wife, then his village when her life is not enough. He moves Roirr away before the second ritual; when his son recovers and asks for his mother, Tanislav flees.
In DragonFable, Tanislav is the troubled leader of Mortem, whose devotion to his son drives him to accept a forbidden cure at the cost of the village. He dies after saving Roirr. The stranger who gives him the ritual is the older Roirr, accompanied by Vaal, making the act that saves his son part of a closed circle in their lives.
Sources
Codex Arachna · Ravenloss · Mortem (DragonFable Wiki) · Secundus (DragonFable Wiki)