Aldnoah.Zero S2, Asseylum-hime, received the necklace which was once gave to her, by her childhood friend and acquaintance, Slaine.
Asseylum Vers Allusia is the known Princess of the Vers Empire. She was once killed on Earth by her fellow Martians. She was rescued and stayed with the Terrans, along with the boy named, Inaho Kaizuka.
After she received the necklace, Asseylum-hime remembered the events while she was on Earth. What would she do after she knew all the doings of Slaine?