NL10: TT and another weird villain

[river-rat]

Full Tilt No-Limit Hold'em, $0.10 BB (6 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

MP ($10.57)
CO ($3.89)
Hero (Button) ($10.52)
SB ($26.96)
BB ($10)
UTG ($5.43)

Preflop: Hero is Button with :tc, :th
UTG bets $0.20, 1 fold, CO calls $0.20, Hero raises to $0.90, 3 folds, CO calls $0.70

Flop: ($2.15) :qd, :5d, :6s (2 players)
CO checks, Hero checks

Turn: ($2.15) :6h (2 players)
CO checks, Hero bets $1.50, CO raises to $2.99 (All-In), Hero ????


Villain ist neu am tisch 7 hands, daher keine stats

Hab hier absolut keinen plan was der will... turn ist ja imo blank es sei denn er hat A6 gespielt
wie spielt ihr die hand? bin ratlos