C stand for Comiket are...well doujinshi fair which always include cosplay number just the number it held comiket93 or C93 got a few or many azur lane cosplayer
fun fact, many hentai manga also sold at comiket so C93 at initial name of manga mean its also sold there
KC : fully RNG, nothing animate AL : their fate in your hand, animate, bullet hell especially in hard stage for event and latest world
I just started playing a few days ago. The menus have enough english in places that you can mostly figure what to do. Been interesting so far.
Ah, I believe they are for retrofitting certain ships, like the 3 starters ships. If you select a ship in the dockyard, there is an arrow pointing up surrounded by some stuff in a swirly circle thing. EDIT: Most ships can't be retrofitted.