She is a girl but her personality like a boy but ahe still got some girl in her 

Playful,innocent,full of energy,speedy,strong

Female security guard at scp foundation the name is beth

Strong looking but easy to blush

She is depicted as a female  with a slender and athletic build. She has zhort blonde hair with a ponytale and she wears a white and black bodysuit with a Valkyrie-inspired design.

Mercy's outfit includes a pair of white, high-heeled boots, and she also wears white gloves and a white collar around her neck. Her outfit is accented with blue and gold highlights, and she carries a staff with a glowing blue orb at the