|World||Ni No Kuni|
Swan Island is north of the Summerlands continent, and includes Ugly Duckling Isle (the southern island in the chain). It is home to many of the familiars (Mite, Drongo, Thumbelemur, Seed Sprite, etc.) that you started off with.
Ugly Duckling Island is also home to Tokos, which gives lots of EXP when defeated.