Also known as: 深海双子棲姫
An Abyssal Ship in Kantai Collection, implied to be the counterpart of I-13 (Kancolle) as she was historically sunk en route to Ulithi Atoll to rendezvous with the other Seiran-capable submarines. This is reflected in the damaged/final form of the Twin Princesses, where White Hime is presumed killed by the player.