My MC starts off the story searching for her family. her goal quickly changes to survive first, then find my family. So at the end, she is safe, and happy about being safe. But still the overall goal (cont in next volume) is to find the family.
OS is what “everyone” wants… In the larger story, she is avoiding them discovering her secret identity. And when she avoids being caught (survives) and arrives in the safe place, it ends well for her. Not bittersweet per se.
The MC changes her goal at PP1 to survival: from finding them to escaping capture. Arriving at a safe place. She is trapped. She gets out of the trap.
So for the overall story it’s good for the MC. But the “other characters” don’t get what they wanted, since she succeeded in eluding them. Success?