Yolanda Park's parents don't care if she lives or dies. 

...This probably isn't literally true. Probably they would in fact be very upset if four years after she was whisked off to school she didn't manage to whisk herself back again. 

They just. Seem to take it for granted that it will happen. And that's so stupid Yolanda doesn't have words for it. 

Yolanda complains about them to Auntie Chu at least 50% less than they deserve, because Auntie Chu has a tendency to cluck at her about filial piety if she goes too far. Since Auntie Chu is excellent in essentially every other respect, and does perceptibly give a shit about Yolanda's survival chances, Yolanda lets it slide. 

Auntie Chu isn't actually related to either of Yolanda's parents. She moved from China to their small mostly-Asian-American neighborhood when Yolanda was five, for reasons she refuses to elaborate on, besides the fact that it involved a difference in opinion with the head of the Nanjing enclave. 

Auntie Chu took Yolanda out for ice cream after she figured out that her affinity was personal enhancements. Mother had gone on for almost an hour about how it was a useless affinity for making alliances, and how maybe if Yolanda were less selfish as a person she would have ended up with an affinity worth something while Father just looked disappointed in her. 

(Yolanda doesn't think she's unfilial at all. All her filial piety is pointed straight at Auntie Chu, where it belongs; as far as she's concerned, her parents forfeited any right to it long ago.)

(Yes she knows that's not how filial piety works shut up.)

Yolanda doesn't bother going to her parents, for graduation packing. She'll bring the letter they wrote, for her older brother, if he's still alive, but she won't allow them to sell any of the rest of her weight allotment to enclavers. They aren't interested in listening to any arguments about how it's her weight allotment and she doesn't consent and she does, in fact, value her own survival above sucking up to the enclaves. 

(...She does have to value sucking up to the enclaves to a certain extent. Enclave kids and kids in alliances with them get out alive with far higher regularity than anyone else. But she does not remotely trust her parents to handle the relevant tradeoffs appropriately.)

Instead she argues that by coming in as a glorified mailbag she'll lose their respect and encourage them to take her for granted. She isn't sure she believes every word that comes out of her mouth; she knows she doesn't remember all of them afterwards. But her parents don't make any agreements that she has to either break or make room in her weight allowance for, so she's willing to call it good. 

She packs at Auntie Chu's house. She's not sure her parents even notice. She doesn't comment on this to Auntie Chu. Auntie Chu sends her off with hand-me-down artifacts and new clothes and a wiry hug.