My favorite character is kind of four in one ^-^;
It's Rosaline! Transformed Rosaline to be exact~
Rosaline is the "damsel in distress" of the story (which I follow very closely), but that doesn't mean that she's weak. Cursed to live several lifetimes without love and with tragic deaths, from the martyr Portina, to the imprisoned Nefertiti, to the emotionless, lonely Rosaline... Only a strong person could come out of such a tragic cycle and still have hope for the world, and love for its inhabitants.
It must have been a painful existence for Nefertiti-- to know that you accidentally caused the death of your true love, to be married and forced to have children with someone you don't love, to be so desperate to break free that your soul gives birth to special children destined to one day save you, and then live on immortally as the target of evil forces in an immobile statue, watching your reincarnations live the same sad life that you did.
You truly feel like a hero when you can break hers and Enkicladus/Don Danihen's fate (challenging even the GODS to do so), and it is worth it in the end, to see two people together who were always meant to be, but were always torn apart. Rosaline's new personality is as bright as her design, as if her entire being is finally content. You can just imagine her having a happy life with her love, and that makes all the annoying boss battles you struggled through along the way feel worth it.
Who could say no to such a cute face?