We get title drop moment during her reflecting on this loss.
Out of the things she got to improve herself:
Magic Eye/Evil Eye - detect anything with MP within certain range, so she can 'see' even with her eyes closed. This is to make up for the poor eyesight trait.
Feather Gatling - fire feathers from her wing
Dark Implosion - make a sphere, delete.
A magic skill that let her cast without having to voice it.
--
Gil was shocked to see her not only back so quickly, but seemingly even more powerful (more wings)
Wayne think that the event wasn't 'calamity subjugation' as they thought, but rather it's 'calamity reveal' event and it's basically unwinnable fight so he want to focus more on gathering intel.
The knights arrive as reinforcement, but quickly get wiped by Rare as she test out those new skills she got.
Right after giving Wayne a 'shoot the messenger' treatment (tell him to pass on to the others that she'll eventually kill them too, then kill him) her subordinates finally revive.
She tell the beast girls to keep working towards the volcano, then turn back to her current target: the capital.
First she summon more of the skeletons (Adaman) to hunt down inns in the capital, because that's players' respawn point.
Then she summon Sieg to lead them.
Sieg then ask for permission to summon more skeletons.
To her surprise, Dias suddenly shows up.
Sieg and Dias explains that they had him cover a skeleton as Sieg summon them, so for that short moment Dias was treated as an item and summoned along with the skeleton.
Amused by the high quality of 'AI' to make individual decisions like this, Rare ask the two to join her in taking the castle.