Name: Markus Ortega 

Species: archdemon

Appearance: 
hell form
http://images1.wikia.nocookie.net/__cb20080923231555/onepiecefanon/images/5/5a/Anime-Vampire-1-.jpg

ascended: http://ts4.mm.bing.net/th?&id=HN.608003026670060251&w=300&h=300&c=0&pid=1.9&rs=0&p=0

normal: dark caramel skin with black hair with bangs to his left side that slightly covers his eye. he has bright green eyes that give him away unfortunately and he has long legs and somewhat muscular arms 

Age: 1900 

Gear: the daggertail
http://ts2.mm.bing.net/th?&id=HN.608012488475345265&w=300&h=300&c=0&pid=1.9&rs=0&p=0
armor: obsidian armor (literal obsidian)

Powers: not sure if it aligns with arch demon but power of lightning 

Other: Oreo chocolate