Villain is unknown; however he has been at the table for a couple of orbits and the manner in which he is playing leads me to believe he's a fish in training. I expect him to have stats in the 60/20 range when they pop up.

Can I raise the river?

PokerStars No-Limit Hold'em, $2 BB (6 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Hero ($314.80)
UTG ($197)
MP ($388.35)
CO ($76)
Button ($187.20)
SB ($85.25)

Preflop: Hero is BB with K, 2.
1 fold, MP calls $2, 1 fold, Button calls $2, 1 fold, Hero checks.

Flop: ($7) T, J, A (3 players)
Hero bets $6, MP calls $6, Button folds.

Turn: ($19) Q (2 players)
Hero bets $16, MP calls $16.

River: ($51) Q (2 players)
Hero bets $44, MP raises to $88,