We Are All Lost
A Changeling’s Kith is the purpose she was forced to serve by her Keeper. It changed her, redefined her very existence to fit this role, and it stuck with her through her escape. There are, quite frankly, a lot of Kiths to choose from. The full list can be found on pg. XX, with descriptions and the supernatural abilities they grant.
A Changeling’s Kith is defining, but it does not define her. An entire Motley of Changelings could share the same Kith and be entirely different people, differentiated by their Seemings. A Wizened Telluric is a living observatory and might constantly consult the stars with the equipment attached to his body, while a Fairest Telluric simply leads a charmed life, taking the actions that the constellations deem correct with an unwitting grace.