Chapter 263- Leislet Vs Lein (Part 1)
Light manipulation, many would think it was merely useful against enemies that were full of evil like beasts and most non-human creatures. So, this power precisely wasn't the best weapon against other people and humans in general.
Leislet was aware of that fact and for the longest time couldn't fix that glaring flaw in her powers which also affected a lot of the things she faced. One of them was the war she fought against the invaders from Ecrasia.
She felt useless in that war, not being able to help or change the tides of war. The only thing she could do was to watch Acht as he fought alone and faced the danger alone. All of that weighed on her mind and made her rethink all of her choices, one of them was light manipulation.