KK facing a 4-bet

1-3 NL...

V1: Heavily inked 30-something WG, with some of the ink being poker themed...playing fairly tight, seems like a non-descript low limit TAG. ($450)
V2: 60-something WG...not at the table long...bought in for $100 and is now down to $25
Hero: 60-something WG...playing fairly tight ($400)

V1 raises UTG to $10, V2 next in shoves his remaining $25, folded to Hero in BB who raises to $50...V1 4-bets to $150...Hero...?