Be gentle with her Achievement
Be gentle with her100
Elika saves you fewer than 100 times in the whole game.
Beat the game with Elika saving you less than 100 times.
Every time you see a short clip of Elika reaching out her hand you have been saved. When this happens you will start at the last piece of solid ground you reached before dying, if you died during a boss battle you will be saved and the boss will regain some health.
If you're about the fall to your death in a area you've already healed you can press the button and teleport to a different healed area without Elika saving you.
You can also save your game after completing any large string of jumps and load if you fail. Doing this practically guarantees you the achievement, but will make the game take significantly longer to complete.