pfr is 17-14 with 75% fold to 3b, caller from the blinds is 22-12 fish who wins at showdown with weird hands a bunch. I'm not sure he's calling a whole lot if i c-bet here, but i dunno, i cbet all my air in this spot obviously = ?? bet $4.50 as normal, or check it back?

PokerStars No-Limit Hold'em, $0.50 BB (9 handed) - PokerStars Converter Tool from FlopTurnRiver.com

UTG+1 ($56.15)
MP1 ($50)
MP2 ($51.95)
MP3 ($50)
Hero (CO) ($50)
Button ($84.15)
SB ($25.50)
BB ($49.55)
UTG ($79.85)

Preflop: Hero is CO with Q, A
1 fold, UTG+1 bets $1.50, 3 folds, Hero raises to $5, 2 folds, BB calls $4.50, 1 fold

Flop: ($11.75) K, A, K (2 players)
BB checks,