The top one is Crona's sex so it's what he biologically is. Gender is what YOU process as. Crona has never clarified for us so yes it is unknown. Either way Crona is still my favorite. Right above Kid.
Based on the fight between lord death and asura from the anime and manga of soul eater. Good and evil, order and madness, neither can’t exist without each other. If you’re fan of this anime and or manga then this is the right design for you.