This here is Sor's second default outfit that oftenly wears.

Outfit Description
He still wears his green bow on his head and wears a white bra top with green trims on upper side, a dark gray corset and a light gray miniskirt with green trims underneath he also wears matching black detached arm sleeves and legwarmers both with dark green trims including his black high heeled boots with green soles and heels.

The appearance of the outfit is inspired by an RWBY character Penny Polendina.