uhh, ok. Since nobody knows pretty much any of my story(seeing as how I still haven't made a topic about it over the past year I have been here), I am just going to say some stuff so this makes sense, Skarta used to be a matoran, but then he became evil and stuff. My guess as to why he has a skull for a face is he got infected by meso or some crap.
Titles: The Skeleton, Mesonak, The Bony Sandwich(don't ask)
Personality: A more angry version of papyrus.
Equipment: Iron Armor, A Better Hat Then A Dermis Turtle
Weapons: Some Fancy Sword Thing I Haven't Named Yet
Mask: None(wait does a hat count?)
Story Stuff: I think I already explained most of this.
And here is a pic of him next to his bigger version.