Asuka is a local of Germany, Asuka has long reddish hair and dull blue eyes.
When the Wunder prepares to go to Antartica, Mari and Asuka get their new plugsuits.
When not on the Wunder she lives with Kensuke, much like with Mari on the Wunder, and he cares for her as a father figure, Asuka would rather isolate herself from the rest of the community.
The tub appears to either be filled with a red liquid indicating that she tried to kill herself by slitting her wrists or rusted at the bottom, implying that shes either in an old tub or shes been there for a very long time.
While initially wondering if Shinji was waiting for the right moment to appear, she is grateful that Shinji saved her.