HUNK kept to himself, only doing what benefits his mission and at times himself. He doesn't need, or want, help from others - unless it's beneficial at the moment. 

Patching up the wounds, isn't. But still, he drops by the infirmary every few weeks - just to see you. He hardly talks to you, he'd never admit his ulterior motive to his visits. Instead, he'll quietly enjoy whatever attention you give, then leaves right afterwards. An inconsistent cycle - and one he's happy to maintain.