Attack on Titan x Male reader

Everyone in Marley was shocked to know that M/N Cleary the last child of the noble family that used to serve king Fritz only to be the ones who were informing Marley of ways to kill the king. The family was hunted into near extinction when one of the king Fritz found out as they were in his words the reason Ymir Fritz died. In order to make it easier for him to find them he made sure all of the family were born with the birth mark of a black heart,to mark their betrayal. They family were also know for having the snake Titan, the Titan that could create anything from its body parts, the Titan that had three snake heads, the Titan that could turn the armoured Titans armour into dust with just a flick of its finger, the Titan that produced small amounts of molten lava and steam like the colossal Titan, the Titan that had teeth sharper and stronger than the Jaw Titans, the Titan that was faster than the cart Titan and stronger than the female Titan. Follow him on this story we're he joins Annie, Bertholt, Reiner and Marcel in their mission to eliminate those of Eldia.