Vin can contol more than one metal object at once though and Naruto and his clones have a lot of metal on them; the clones die via metal blitz. Iron and steel also project blue lines that point to nearby metal so a sneak attack won't work; it would be impossible for Naruto to sneak up on her. Vin's not tanking a Rasengan, true but she can still take a lot of damage with pewter burning. Percy could win if he gets Riptide back and gets into the ocean but then he still has to deal with Naruto and Vin. Naruto's only getting to Percy in the ocean if he's at least one tailed, if not Percy swamps him. If he is one-tailed or above Percy can't hack it. Then there's Vin. Percy in ocean vs. Vin depends on whether Vin has burned her Atium yet. If she has burned her Atium which is unlikely because it's so rare, Vin gets swamped. If she's got he Atium Percy's screwed because not only can Vin predict his movements but she'll most likely still have iron and still on board and all of Naruto's metal ninja tools to play with... :!: Naruto vs. Vin: Depends on whether Naruto goes any tails. Vin can handle base Naruto without Atium and can handle up to three tails with it. Four tails is to much even with Atium and I doubt Vin could Soothe away that much anger. So this fight really depends on three things: If Percy can get into the ocean, whether Naruto lasts long enough to bring out his tailed forms and how many, and when Vin burns her Atium.