Louise King's DNA comes from a butterfly. Her ability is especially useful as it allows her to absorb and retain toxic compounds and release them through her skin.

She wears flowing robes to disguise the wing-like structures under her arms. Brilliant designs on her face stand out like stained glass on her pale skin, giving her the look of a heavily made up stage performer. 

When Louise disagrees with someone (which is often), she says, "What about it?"

We first meet Louise in Book 6 of The Human-Hybrid Project, Taking the Tower.