Nice! Added a lot of detail, and the timeline still checks out. It explains the character and his abilities nicely. Well done. :]

Assuming the other players are happy with it, no one has any rejections, I'd say this guy's accepted. 

Now it's just a matter of tossing him into the crew. If you want that done soon, you might want to do something similar along the lines of Mark, and find an excuse for him to be at the party and get tangled up in Nova's problems.

Otherwise, he could be a peer/acquaintance of one of the crew that contacts them for a job (and ends up at the party and/or in Nova), be a random encounter of sorts post-mission, or found somewhere around the next quest. (Or any other idea that fits.)