Added "seiyuu_connection" tag due to the very vague seiyuu connection at play here between Kongou's namesake character in Kantai Collection and Nao Toyama's role as Karen Kujo and the style of animation used in Kin-iro Mosaic.

mamott99 said:

Added "seiyuu_connection" tag due to the very vague seiyuu connection at play here between Kongou's namesake character in Kantai Collection and Nao Toyama's role as Karen Kujo and the style of animation used in Kin-iro Mosaic.

Vague, but unfortunately, not a direct link.

If the lines are Kongou's from Kantai Collection as the translation note indicates, then it's not really vague at all. Seems quite intentional.