If V1 is the type of fish who is bluffy/stabs at pots often when checked to (which I am assuming he is based on the flop donk) then I think your hand is very likely a fold, which I would do in this hand.

If V1 is the passive type of fish who calls down with super weak holdings much more often than betting them himself then I think V2's hand range is much more polarized with a slightly higher bluffing frequency. But given the fact that he knows how V1 plays couple with a low river checkraise frequency, I think your hand is very likely a fold.

Fold. 

@OP: you know your friend best, if you tell us that his "look" was a sign of strength and you tell us further that you know each other´s game so well, why do you come here and want insights on his range - where nobody knows him?

tradebyday, this is the 2nd post in a row that I read the same one word from you, it wouldn´t hurt if you elaborate your ideas a bit more. That helps nobody.

Well he's repping very little. In a vacuum it looks bluffy to me, but hey not so many people XR bluff river. Is your friend competent enough to realize that your range is mostly 77-QQ + bluffs that gave up the turn, since you didn't bet the K?

If so, I think he'd realize that it's hard for him to bluff his missed draws by betting (he'd get snapped too often by the fish or yourself) ; yet, if you bet he can put a lot of pressure on your capped range by raising ; as opposed to leading, XR as a bluff is a viable option, especially with the missed nut FD, as Ahi will be good sometimes at showdown (so he can check river more happily than with 56s).

Is he capable enough to XR a Kx hand for value river? (his mostly kings being flush draws with the Kd)

It really comes down to what you know about his game...

Thanks guys.. I was actually the "friend"/Villian 2 who check raised river...after talking the hand over imediatley after the session I wasn't sure if it was a good spot or not. Wanted a view from what "hero" in this post was thinking and what you guys thought as well....

Btw I turned pocket Tens into a bluff otr. And showed obv...

Hum TT must be the best hand you can turn into a bluff, it's quite possible you get called by worse vs some opponents (8x, 99). One problem is that it's pbbly EV+ to X/C this river, so XR with TT has to be more profitable than calling ; one note: if you call there is a small % probability that fish will call with worse or raise himself. Not saying that it's a common occurence, but when you XR river you push the fish out of the pot for sure.

If your opponent think you're not often out of line, well XR bluff river in this spot is likely to be profitable vs a capped range. Just don't know if I'd do it with TT especially.

Still, it looks bluffy to me, since if you had a value hand you'd be more likely to bet out that XR IMO. XR looks strong, but might not be the best value line. IDK, would you expect the fish to stab light this river? Call very light if you bet out? This is quite important, because if fish is very passive but very stationary, well you have to bet this river instead of XRaising IMO.

As for showing, I understand you might want to impress / tilt your friend, but I think you shouldn't  do that too often (except if you're sure you'll induce something in your opponent), especially in this spot (it might look cool to show you can turn made hands into a bluff, but I don't think it's good for your image + all the infos you give for free!). Please don't be too proud of you bluffs in general anyway, it makes play bad (introduces your ego into play).