User blog comment:Kuras/Fall Event 2016/@comment-28417650-20161123230710/@comment-29735334-20161124031131

If you have spare ship slots, Chito/Chiyo AVs along with their CVL conterparts are worth keeping, IMO. Who knows if one day Tanaka will hit us in the face with fast AV requirement. They are also the only "dupes" in my base, btw (I have a policy of keeping only one girl each, with some exceptions. Taigei/Ryuuhou will fall in this exception, too, provided I can get another... whale).

B44 is S-ranking 5-1 boss with Hiei, Kirishima, Nagara, and "true lady" DD and her thunder sisters. Not the most fun of quests, tbh. =_=