ENTRENCH
Choose a character.
Friendly characters adjacent to the character ignore knock back and critical hits.

So does a critical hit miss the adjacent character or does the roll simply count as a 12 without the bonuses? Granted a 12 still means pretty much everyone can hit, but it's still a little ambiguous.

If someone rolls a crit hit against you then they get the +1 damage but they don't get the knockback

A critical hit still automatically hits, but the Entrenched character doesn't suffer knockback and doesn't suffer the +1 damage.

It's what Peers said. you receive normal damage but ignore the knockback and extra +1 damage

Peers is correct.

I always wanted to say that! ;-)

In the Judges forum at WK it said that the 12 doesn\'t count as a crit for auto-hit or for the +1 damage, rather it was a just die roll of 12.

This was brought up on the Wizkids rules forum.
With Entrench, a roll of 12 is just that. If you needed a 13 to hit, it isn't an automatic hit. There's no +1 damage, no knockback, and you can't use tokens from the Critical Strike battlefield condition card.

Edit: The Vision got to it before me!

This card only mentions adjacent friendly characters. Can the person the card is assigned to use it for themselves as well?

No.
filler.