Ainz was thinking about CZ's character and wishes to strengthen his relationship with her. When he entered the Laboratory, he found out that CZ has been modified into CZ2128 Δ MK-II by Solution and Entoma (making her look like a tank). They explained that they are strengthening CZ by modifying her. While CZ had no objections, Ainz still disagrees. Solution and Entoma further explained CZ's new features like her Drill and the button in her back that breaks her character. Then, Yuri, Lupusregina, and Narberal entered the room and as Ainz was explaining how Solution and Entoma are going overboard, Solution and Entoma further modified CZ, this time they made her look like Gundam that can also fly. (thetvdb.com)