Quote Originally Posted by Aidoru View Post
The cores are for draconic eyes shards. You need 3 completed eyes for awakening a hime according to the JP wiki.

And Nike is permanent. You can tell because she doesn't have her own page saying limited time like the summer girls.
ah~ thx fa the info. well, that put me at ease since i was trying to get her. wanna get all awakened story girls.