Siobhan is a girl who, seemingly at random points in time, visits Arkan. She gives mysterious advice to all who cross her path. It is highly recommended that you listen to her advice.
Her hair changes in color everytime she arrives in Arkan, as does her face. You can always recognize her by her eyes, which are always bright green.
Siobahn is considered a resident of Arkan, although she is never counted in the total number because she seems to always be absent for the annual cencus.