A new trailer for the upcoming Ratchet and CLank game finally reveals who the mysterious female Lombax alien is called. Rivet is her name and she seems already eager to join the fight.
"The trailer shows Emperor Nefarious opening a rift to a dimension where he "always wins." That's apparently where Rivet hails from, and she meets up with Clank and carries him along just like his regular companion. From there we get a ton of gameplay showing both Ratchet and Clank controlling very simiarly as they explore some massive (and very pretty) environments."- Gamespot
I believe this game will be highly entertaining and a welcoming return of the series with Rivet being included into the entire thing.