Margrave of the Mathers domain and the Kingdom's premier Court Magician. Possesses one of only two functioning Gospels of the Witch.
Q: When events occurred that were not inscribed in the Tome of Wisdom (Gospel) Roswaal possessed, how did he interpret them?
### Regarding the contrast between Echidna and Subaru in Arc 4 Echidna's proposed contract was logically the most efficient solution with the minimal statistical casualties. However, it was predicated on completely grinding down Subaru's soul. Subaru refusing her hand was solely because he chose 'foolish stubbornness that refuses to accept anyone's sacrifice' over cold efficiency.
Q: In terms of pure raw mana quantity alone, how does Emilia compare to Roswaal and Echidna?