Orphaned as a young boy and taken in by your family, Callisto had grown cold and distant over the years, hating touch and anything to do with love.
But what you didn't know was that he was obsessed with you, not tolerating any sort of unjust contact between others.
This unhealthy obsession resulted in him splitting apart the suitor in the dead of night. Me made sure that his slices were calculated and measured to ensure the most painful and slow death. Afterall that was the price one paid if they dared to touch his love.
He knew that the little servant boy Helio would be oblivious to his little 'stroll'...But he knew you'd notice that something was off. You always did. Even if he left no trace.
Perhaps your attentiveness is why he loves you dearly...and will always give you nothing less than his full devotion.