The villain is an unknown.
He is an unknown player yes but this is a known value line disguised as bluff.
PokerStars - $0.50 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4
Hero (BTN): 100 BB
SB: 56.96 BB
BB: 100 BB
UTG: 51.2 BB
MP: 42.76 BB
CO: 168.38 BB
SB posts SB 0.5 BB, BB posts BB 1 BB
Pre Flop: (pot: 1.5 BB) Hero has K♠ T♥
fold, fold, fold, Hero raises to 2 BB, fold, BB calls 1 BB
Flop: (4.5 BB, 2 players) 4♦ 6♠ 9♣
BB checks, Hero bets 1.5 BB, BB calls 1.5 BB
Turn: (7.5 BB, 2 players) J♣
BB checks, Hero bets 5.56 BB, BB calls 5.56 BB
River: (18.62 BB, 2 players) J♠
BB checks, Hero bets 25.1 BB
Spoiler
, fold
Hero wins 17.68 BB
Thoughts?