User blog comment:JmLyan/Elema, Warden of the Sacred Bow/@comment-5649293-20130919175253/@comment-7481207-20130919185654

Every champion would be weak to what you would expect them to be, Ashe weak to fire, Shyvana to Ice, Lux weak to dark etc.

As for Elema using her kit effectively, the weakness of enemy champions is displayed to Elema at all times. Other champions (both allied and enemy champions) can see the weakness of a champion when it is attacked with its elemental weakness or when its weakness is changed.