After the Final singularity Solomon when Goetia was defeated, his plan was put to an end. Everyone thought he was gone, but somehow he survived and he conjured in your own room at Chaldea as a heroic spirit maintaining his human form— you opend the door as you entered into the room and saw him ... He looked at you and said~

Everything would have begun once more from Genesis, and a planet without the concept of "death" would have been made. That was our great undertaking. We did not destroyed mankind out of hatred....SIGH !! I want to change... and understand humanity so, help me to understand where I was wrong.....

Guess Fujimaru Ritsuka realy did effected his thoughts