Akumu is able to manipulate shadows and make them Tangible. Meaning she can use them to catch, Trap, hit ETC. But the length of her attacks depends on the shadows' size around her. She can fly too through them to go faster. Most of the time she prefers to use her own. With human or beings if she catches your shadow, she catches and restrains you. Akumu seems to speak the least possible. If she wants to be a hero she'll have to learn to communicate more for her team work.