You desire anonymity
Reference to the name "TOR". If you do a google search for "Tor", the first entry is a software program called "Tor Project: Anonymity Online".

A mind of equanimity
Equanimity: Mental calmness, composure, and evenness of temper, esp. in a difficult situation. Tor, even when faced with healing racist unicorns (difficult situation) and healing Mauja (racist unicorn), Tor was always written as calm, composed and even tempered.


Goodness born of sludge
Tor gained her healing magic through finding mud or sludge in the Spectral Marsh.

Maybe needs a gentle nudge
Fluff, but could also reference when Phi gave Tor a push to heal the racist, ex-edge unis.

Ashen dove, fly
Ash is a color that describes both grey and white, according to webster. Since Tor is a grey and white pinto, it seemed to fit :) Fly was just to throw people off with a pegasus reference

Exhale your bitter sigh
fluff

Four total direct character reference to TOR.
"The prisoner cannot escape, be challenged for, or re-stolen for 1 week. " <-- I waited a week since Tor was stealthed by Lace.