they weren't there in the last version, i would know, i practicality played that game to death
all of them were in 1.8.3 (there's no new characters in this update, only Storm and Rias rooms are completed), maybe you had a previous version
now that you mention i think it was 1.8.0, although what you mention sounds familiar too, i know overwatch was added but mad moxxie definitely looks new