Konosuba: God’s Blessing on This Wonderful World!, Vol. 17 (manga)

After her explosive assault on the fortress is rendered harmless thanks to Aqua’s freakishly quick repair skills, the evil god Wolbach pays her a personal visit!
Face-to-face with her divine foe, Wolbach immediately spots Megumin’s familiar, Chomusuke, and judging from its reaction, this second Wolbach might not be the fake Megumin said she was…