Tatsuta was the second Tenryuu-class light cruiser of the Imperial Japanese Navy. She was completed in 1918 and sunk in 1944.
In Kantai Collection, Tatsuta has short purple hair and purple eyes. She wears a one-piece school uniform with a skirt and has a mechanical halo above her head. Her gear usually glows a greenish yellow color. Her weapon is a glaive. Her seiyuu is Iguchi Yuka.
Her in game "wedding" line is an excellent example of her sadistic tendencies, it is essentially a rejection, delivered in a flirty, somewhat smug way. Sometimes nicknamed "Devil Ship Tatsuta" (鬼畜艦龍田) among the fandom.