Designer Anna Karlin has infused 10 model residences at One Manhattan Square with her signature style. Each of the Karlin-designed Lower East Side apartments for sale is based on a specific character archetype: “The Instagrammer” home, for instance, is full of eminently Instagrammable modern furniture and accessories with pops of bright color, while “The Urban Gardener” residence is awash in plant life and green accents, from paint to furniture.