I wonder if this is a prequel of sorts to the other drawings this artist has featuring Kaga and Zuikaku. Here Zuikaku seems to have just gotten her first scars, while in the other drawings, Zuikaku is heavily scarred and Kaga is a minitiature version of herself. Newly built probably. Kaga looking a bit Abyssal here, and Zuikaku's skin also being a lot paler in the other drawings, also makes me wonder if shipgirls invariably become more Abyssal-like as they grow older, or if this is a consequence of some personal tragedy.