Cree is an *******. He loves 'making friends' and secreting away all their wonderful treasures for himself until theres nothing left. And then he simply moves on.
It all worked out very nicely, until That Day when he was shackled to a clan of hippies. A Certain Young Guardian took one look at him an started squawking about Cree being their Charge. A bunch of rubbish, all of it. But the hatchling's clan took it very seriously, and Cree was 'pressed into service'.

Its not actually bad for him, to have a steady home with steady kin. Cree mostly just likes to make snide complaints. Ihsen is about the only dragon who can prode and badger Cree into not being a total caboose.