As RP character, Zahadrin is a long lost heir to Kaim. He is also a magic master, and part demon. His demon form has been dormant for some time, but awakens when agitated or annoyed.
True origin of Zahadrin: From my series 'The Dark Times Chronicles'. He was a great and power hungry wizard who never was able to eliminate his enemies. A spell he cast on his children would be past down until a certain time for his great grandchildren to destry them for him.
Also knows special abilities known as Noble Phantasms. (For knowledge of refference, look at Fate/Stay Night Archer and Gilgamesh)
Hmmm....as long as you start him off in the rp with a little power at first, losing a couple of battles, gaining strength, joining with other villains, maybe leaving them once he thinks he's strong enough and back for revenge more powerful, sure then I can tolerate it...
Sounds good, but it would be even better if you tweak the weapon's power a little bit just so those other 3 characters aren't the only ones who can try to stop them...other rpers should be given the chance to team up with you to try and stop him