Ancient child don't be weary - Unicorns are an ancient race of creatures. Arah is a unicorn.
The time for beating yourself against the ground is through
Perhaps a lion, but always a lamb - Arah is kind, nice and always friendly like a lamb, also colour ref. Lion, well she can be quite brave at times.
If you're not careful
Your frail bird's bone will snap - I guess she could be seen as frail.
Met by kindness and a caring soul - Arah personality ref.
Your heart will not thaw if you stay where you are - The Basin is turning her cold and she's getting used to living in a harsher climate.
Come with me and join the crew
'Cause here, you'll find family too - Big deal about joining the Basin. She wanted a family.
Every day I shall await breathless
For your arrival
Come to me by day
You need not hide anything from me
Although you keep them close to heart, they have already been forgotten. - Her old family? maybe...