Upon discovering Laffey has seemingly developed amnesia because of the treasure jewels inside the chest, Javelin, Z23, and Ayanami tried to restore Laffey's memories by having her to sleep on the chests of several shipgirls; such as Formidable, Belfast, Honolulu, Baltimore, and Minneapolis, eventually revealing in the end that she was half-asleep the whole time. (thetvdb.com)