I'd assume Light Cruiser Oni and Submarine Hime got captured and then taken home?

Nah she was released back after she had finished playing with the shipgirls

Jeez, where is Inazuma getting her growth milk? It looks like she's still growing with each pic!

This calls for pooling the series instead of keeping on the parent-child approach.

I cannot help but see professor when she got caught

shingeki no inazuma