Fortress battles take place in Balaurea and other worlds.

Fortress Battles are huge battles in which fortresses must be captured to damage the Balaur and set up important bases from which to launch the assault of Balaurea.

Has Daeva ever participated in a fortress battle, nyerk?

If Daeva takes part in a fortress battle and brings Odanerk a Fortress Battle Conquest Seal[pl:"Seals"], Odanerk will richly reward Daeva, nyerk.
Daeva will get a Fortress Battle Conquest Seal[pl:"Seals"] if Daeva earns a level-5 or higher reward in a fortress battle, nyerk.

Can Daeva manage, akakak?
What does Daeva bring?

If Daeva has not yet won a fortress battle, Daeva should put more effort into it.
Wow, Daeva is amazing!

Odanerk didn’t expect Daeva to manage.

Here’s the reward Shugo promised, nyerk.

And pay no attention to Odanerk’s rudeness.