Kongou is a former member of the Royal Navy who is currently associated with the Sakura Empire. She acts like a member of the Royal Navy, but her caring nature is more in line with the nature of the Sakura Empire!
Her accolades have given her the job of acting as the receptionist for the Joint Military Exercise, while also granting her the privilege of participating in the event with Yamashiro. She is doing her very best with her protégées to make the event a success.
Though her frame is small and cute, Saratoga holds an undeniable power, like the aircraft carrier she is named after! She is Lexington's younger sister who is trying to carve her way as an upcoming idol.
She's down-to-earth, but she does have a knack for teasing others. It isn't unusual for Lexington to catch her in the midst of it... a scolding will ensure, of course. She just can't get away from her older sister. Even still, she's always running off and indulging herself in her usual pranks. As to how her mischief will fare this time...? Nobody knows...
Kaga sees Akagi as her older sister, despite being as strong as her. She's usually friendly, but often acts as a counter to Akagi's tendency to going a little wild. That said, their temperaments in battle are similar.
She may sound cold at times, but she is a very compassionate individual and has earned the respect of many.
As a member of the Eagle Union, Atlanta is the eldest of the Atlanta-class cruisers, and the older sister of San Diego. Compared to her other younger sisters, Atlanta is more grounded, and is constantly trying to mend matters caused by her younger sisters' randomness. She tries to keep her place as an older sister, but sometimes she misses the mark in doing so. She decides to follow San Diego after hearing that she's going to participate in the Joint Military Exercise.
An elite of the Iron Blood, and older sister to Prinz Eugen. She's similar, yet distinctly different from Prinz Eugen in that she acts irritated in front of those that interest her... a typical tsundere. Hipper doesn't enjoy that Eugen knows this facet of her so well, but that doesn't mean they don't get along. Hipper was invited to the Joint Military Exercise as support. At first glance, it seems like she didn't want to participate, but in truth, she's excited to meet Eugen and the others.