Sorry, Angel. Vergil's a great character, and well-written, but I'm afraid he's a powerhouse. I have to decline for that reason.
In addition to admittedly awesome story that goes along with it, the Wyrsin Series is intended for low or low-medium powered characters, to give them a power boost. The only reason that 'immortality' type abilities or power are allowed on characters in this series is because they're redundant with the extant rules of the Crossroads.
If you had a character with less outright power, I wouldn't mind you joining, but it looks like both Vergil and Caliga are pretty impressive in their own rights.