I had forgotten an important passive:
Punishing Stone: When an enemy grants Emeli an Opportunity, it takes 1 additional damage.
~
By default, Strike! characters have 10 HP. They can spend an Action Point to Rally to regain 4 HP and an expended encounter power.
Most monsters appropriate against a level 1 party deal 2 damage on a hit, or 4 damage on a natural 6; their encounter powers deal 3 damage on a hit, or 6 on a natural 6.
Elites and champions, who have multiple turns, deal 3 damage on a hit, or 6 damage on a natural 6; their encounter powers deal 4 damage on a hit, or 8 on a natural 6.
Dedicated high-damage striker monsters will deal even more.
Thus, Emeli, who has this:
>Passive: Earthen Resilience: When Emeli takes 3 or more damage, she Resists 1. When Emeli rolls a 3 to 6 on an attack, she regains 1 Hit Point.
Is very well-equipped to endure the worst of what enemies can possibly throw at her. She is no better off against weaker attacks, but even against those, she steadily regains HP.
Once per encounter, she can spend an Action Point to negate an attack against her, no questions asked, even if it was a natural 6 on a champion's encounter power.
Now, what can Emeli do with this durability?
Strike! characters have three actions each turn: Attack Action, Move Action, and Role Action. With her Role Action, she can use this:
>Role Action: Pheromone, Ranged 5
>The target is Marked by Emeli until the end of its next turn.
Bear in mind that this does not provoke Opportunities. If she is engaging enemy A in melee, she can mark enemy B.
What "Marked" means is that if an enemy is adjacent to Emeli and tries to shift (move safely away), Emeli deals an Opportunity to it. The enemy takes 3 automatic damage.
If a Marked enemy is within 5 squares of Emeli and it makes an attack that does not include Emeli as a target, the enemy provokes an Opportunity, suffering 3 automatic damage.
Thus, Emeli is a fairly decent 4e-style defender so far.