Opéra Kranz of Solatorobo, dressing up as Camilla from Fire Emblem Fates, as they both have very similar appearances and personalities, it was rather uncanny, so I ran with it.

Art belongs to Henry Ahtom/Hanimetion
Opéra Kranz is (C) of CyberConnect2 and Namco Bandai
Camilla is (C) of Nintendo and Intelligent Systems Co., Ltd