Why did Malekith have such a strong connection to the Aether, and how was he able utilise its powers in ways no one else could — for instance, being able to extract it from Jane's body and absorb into himself, without it having any ill effects on his body, like it had on Jane earlier in the movie.
Furthermore, the Aether's power appeared to have awoken the Dark Elves from hibernation and Malekith's ability to sense the Aether's power drew them to Asgard.
The Aether has no master, so why is he able to wield it? Even Jane couldn't handle its immense power running through her veins.