Hana was seeking shelter after her own pack imploded on itself when she met Naenie. The moment the offer was presented, Hana laid out her options clearly. No hunting, no scouting, no pupsitting. She had a very specific set of skills, and that's that. To her subdued surprise, she was accepted.
Hana doesn't let her emotions get a hold of her. She's naturally calm and collected, but also painfully blunt. Not afraid to make her intentions clear. What she lacks in empathy, she compensates for with how observant she is.