i think this is quite good and can somehow be an additional background for jafar. i mean, after sin and jaf met, jaf have stucked with sin ever since. and as for personality I'd say it's quite close. loved this one for sure.
Ja'far has to choose - a normal life, where he's no longer a killer, or a life of violence where he's allowed to stay by Sinbad's side. In the end, it's not that hard to choose.
It's a dj, and I haven't watched the show or read the manga or whatever it is, so that might be why I was left unsatisfied. It's an interesting concept, but it fell kind of flat for me. But don't take my word for it. Even with shows and manga I have read, I'm not a huge fan of doujinshi anyway.
You are the light and I am the darkness we are like two sides of the same coin. We can not live without the other. Sinbad is the light and Ja'far is the darkness, loved the story.