"No, no I don't want the next best thing."
Whitney is one of those characters with a gift for seeing past people's barriers and looking straight into who they really are on the inside. It would be easy to write her off as naïve - especially given her age - but her brother was killed by his dealers, so...she knows a few things about how dark the world is. That doesn't stop her from feeling things deeply, though. Far from numb, she maybe cares a little too much. And when it comes to Tango, she isn't blinded by his good deeds; she sees that under the biker façade, he is a desperate, scared, deeply damaged little boy in great need of unconditional love. She wants to be his crusader, and her relative innocence is a bright, warm source of comfort for Tango, who feels like he can trust her reactions, since she's never been made to put on a show.
She doesn't really fit into this Dartmoor world. A little too sweet, a little too preppy and genuine, maybe. She likes making breakfast, and she's a midnight painter, and she doesn't like her cubicle job, but likes spending time with her coworkers in the break room.
For some couples, shared experiences are so important. But in this case, Tango needs a lifeline. Whitney isn't thrilling, and not even all that complex, but she's good. And sometimes we need the reminder that there's nothing wrong with just being a good person.