I would smile, often.
Be affectionate with hugs, handshakes, holding hands (as per request from client)
Infuse the therapy session with affirmations about the client.
Let some of my personality/personal life show.
Assure them they are not alone in their journey, I'll be there 100%, no matter what.

Therapy isn't one size fits all. Adjusting always to meet the needs of the client. Stepping away from conventional and text book protocol may indeed benefit the client!

Then again, with these qualities, it most likely wouldn't fly in a real life therapy situation. Therefore, I wouldn't make a good therapist!