The Un-expected Avenger

Elania is a regular human on earth. when she was a baby she was left alone on the side of the road. a storm came and lightning struck the little baby, but what happend after that was un-expected. she grew instantly to age 28 and gain the powers of electricity, better than average strength, super speed and the ability to sense the presence of people surrounding her. she never ages anymore. Nobody knows she has these powers.

8 years after the accident, Elania has a plan. Loki had recently attacked earth and she planned to do the same, with her best friend. when a greater threat then elania comes and its either the whole world including her best friend dies or she and her best friend get rid of this monster but saves her mortal enemies, what will she choose?