Flan flan, you have to choose. Either it's an original character (submarine_hime) or it's the so-class_submarine... submarine_hime is not an actual character from Kancolle.
Submarine hime was just added in the most recent event, as the boss of the E-4 map.vf.nightcore said:
Flan flan, you have to choose. Either it's an original character (submarine_hime) or it's the so-class_submarine... submarine_hime is not an actual character from Kancolle.
http://en.kancollewiki.net/wiki/Submarine_Princess
Ah, I see. You have my apologies then, continue as you were.