That, or she caught him a bit longer ago and since then he has joined the Wardens, and then she joins up and they find they are on the same team? Depends on whether you want him to be new to the Wardens as well. I already have a reason for her being recruited to do with Zaine (he was on a Warden mission to Saturn which they recruited extra help for, including her as an undercover officer, and she was then offered a position on the Wardens after that).