She has very long white hair, orange eyes, and small horns. She wears a white leotard and has two rows of two spikes each along her lower back. She also wears white ankle boots with two spikes underneath them. Her right arm seems to be either a single mechanical arm or wearing a gauntlet with claws.
She is nicknamed "Henderson-chan" or just "Henderson" as a reference to Henderson Field, which is what she is based on.