[@Sanity43217] For plot and lore reasons your character wont work. There isn't any traveling between worlds or realities. Such a thing can only be done by certain individuals and with a great deal of preparation and effort.

His father's benevolent behavior seems to contradict the nature of demons but I'll allow it as "it's part of his more nefarious plan"

Sylax's skills need to be explained better, as "magic"and "shields" are too vague to allow. His interactions with Hell and his father cant be allowed as it breaks the lore. 

To be honest, a lot of it needs to be changed for Sylax to work. A suggestion I have, would be to instead have him be the product of an incubus and a human both living on earth. As he's half human he would have mortality and so placing his birth 400 years ago would be a bit much.

If you're still interested in joining just ask if you have any questions about your cs.