For years this once nameless sentry guarded a hidden prison, deep in the mountains of the ice flight. For more years she watched the ice thaw and as prisoners came in but seemingly never left. It was hard work. It was of little reward aside from favor from the Icewarden. She always wanted more from this life but what more could she ask for?
Then she saw in the distance, a few dragons swimming in the frozen river. Hunting or scavenging, it didn't matter. They were too close to the prison. She raced to defend the prison but couldn't attack the strangers. They stopped what they were doing and the leader of the patrol, a little white and red dragon greeted her, but with caution.
The little dragon asked her what her name was. When given no response, the little dragon called her Beastie. And Beastie liked it.
The group of dragons asked many questions and after a while Beastie found herself following them home and simply never left. These were the dragons she wanted to defend now, even if they live in liquid ice.
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@ Vespertilio