One of the three Demon Gods. He wields powerful magic. Desaro Dios is snarky and incredibly full of himself. He thinks little of anyone else and will only take orders from the Geist Wraith. Adding your own voice filter is not necessary, only the raw takes are needed.

Here's a video that showcases the characters voice in Japanese to give you an idea on what you can aim for. Don't feel like you need to imitate anything, just do what you think makes sense for the character: https://youtu.be/aJs75nCrjNQ