pixiv doesn't have either of them as a tag since it's a Akatsuki-Hibiki-centric collection but Yamashiro fits better and Fusou's long hair wouldn't hang sideways like that
Why is kaga there? Kaga's an only child at the moment. Did the artist mistake Kaga and Akagi for siblings?
She's sort of adopted; she was the replacement for Akagi's actual sister ship, Amagi, which was scrapped before completion.
I wonder why I was waiting...At that time...You have talent,How about you join us in the blooming of lilies?Lit. the flower of yuriwhen I saw Akatsuki.