The manicurist Jin Soon Choi, who immigrated from South Korea in 1991, is a regular at New York Fashion Week, with a roster of celebrity clients that includes Taylor Swift and Anne Hathaway. Her nail art has appeared on the cover of Italian Vogue and is featured in advertising campaigns for Prada, Dior and Jimmy Choo. Ms. Choi, 52, is the founder of JINsoon Nail Lacquer and Jin Soon Natural Hand and Foot Spa. In summertime, sandal-clad fans flock to her three Manhattan locations for the Summer Oasis Pedicure, which features cucumber slices and mint leaves, to soothe their tired, blistered feet. Ms. Choi is married to John Coughlan, 53, an architect. The two met in 1999 and live in a loft in SoHo.