Masada really knows how to write his characters. They all feel very alive and well characterized. Mercurius in particular has one of the best character concepts I've ever seen and his reveal at the end has left me speechless the first time I witnessed it.

Although I do adore Dies Irae for it's pretty much filled with incredible fights, characters, emotional moments, music and amazing messages. I have to admit this series suffers from repetitiveness, especially in the first 3 routes.

Rea route is literally the pinnacle of this visual novel. Most of the best moments within the novel are present in the last 3 chapters of Rea route. With both ending 1 and ending 2 having great conclusions to the story. Without Rea route this visual novel would just be above average.

Overall though I would still say that Dies Irae is one of the best pieces of fiction I've ever consumed and it has some of the best character writings I've ever seen.