Octavia, a renowned cellist within Canterlot, lives a rather comfortable life when it comes to the perception of her admirers and followers. The music she releases into the world is melodious, cerebral and even verges on the line of psychedelic. Although she is only a part of the ensemble, she is recognized as the very face of it. Some say that she is even on her way to becoming a living legend, despite her young age. But few realize that this life of fame comes at the cost of her precious vitality. Every now and then, she ends up sporting a few gray hairs within that smooth black mane of hers.
'for the warm waters to wash away' doesn't really fit anywhere in this sentence.
This sentence becomes a bit tangled. 'Today the ensemble was practicing for an upcoming live performance.'
Calming what?
'Gone' instead of 'came'.
The cello was...?
'As' instead of 'be'.
Considering the perspective, your seems inappropriate here.
'She cares very deeply for our friendship, just like I do' or some variation.
Most of these are personal opinion, so ignore as you see fit.