Xinxin is a treant, possessing her own formidable abilities and methods for dealing with matters. She can discern which tree in this area is problematic and which direction holds a presence that attracts her.
She is not a normal human, so she's capable of much more than these people. She might exert her strength to help others, but she's not necessarily willing to sacrifice her life to save herself or others.
"If life and death are things we can take, if all the struggles for life and death are ones we can make, then we shall strive."
Wanting to go through challenges alone, seeking freedom alone, wanting to achieve everything alone, it's all her own affair. Should others pay for her mistakes? Should others lose their lives for her freedom?
Xinxin knows she can't do anything for selfish reasons; she knows she never considered how they think of her. They're always doing things for her sake, and if one day she realizes she made a mistake, she can't undo it.