Princess Tobin is a Darkwood Elf, the sister of Crown Prince Thelanil. She was at one time betrothed to Prince Mikkel of Silverwood. Tobin was implicated in a plot with her brother and Mikkel's cousin Aimon of Silverwood. The plan was to install Aimon as King of Silverwood and for Tobin marry him, then murder him and rule as Queen.
Tobin had an incestuous relationship with her brother Thelanil. King Conall was unaware of their plans for Silverwood or the relationship between Tobin and Thelanil. Silverwood returned Tobin to Darkwood. The punishment, if any, for Tobin and Thelanil for their actions is unknown.
Princess Tobin is the Castrian counterpart of Toby Williams.