Mari's self image for others reference: (as I assume others would see what they perceive themselves as)

Mari sees herself as walking death ahaha oops.

Her blackened skin looked as though she were a delicate porcelain vase that had been broken and glued back together; angry red cracks pulsated and glowed beneath skin that flaked off and disintegrated. Crimson hair flowed in an unseen current around her. Her eyes are difficult to differentiate from her blackened body, if not for the faint red glow of her iris. Around her chest, where her heart would be every so often there is a glimmer of gold that is barely visible. The red beneath her skin pulsates almost as though it is alive. She has no clothes on in thiis form but any erogenous areas look all but non existent (Think like a barbiie doll! ahaha))

That should hgelp when peeps writing hopefully