v.102 â Rise of Fellowship Update Notes

Or we could just look in the dictionary and see what it means rather than how we see it used;
http://dictionary.reference.com/browse/sidekick

side·kick noun
1. a close friend.
2. a confederate or assistant.


Note the or is neither exclusive nor mandatory. One implication of the word is not the sum of the word's meaning.

so it can pretty much work both ways, cool.