Anna Ruth's work is defined by her personal mythology. She paints her own fantasy worlds in which pearls sparkle and harpies and moths appear. The animals often have a human, gender-blurred face. The artist leaves it up to the viewer to decide whether she sees them as male or female. In her paintings she moves seamlessly between figurative painting and abstraction, working with contrasts of light and shadow. Compared to her earlier work, her contemporary works are lighter, with a positive charge. They are also often large paintings. Typical of her work is the use of rust, which she pulverises and mixes with acrylic binder. The result is muted, earthy colours.
In her exhibitions, the artist incorporates her paintings into installations, using them to develop a given theme beyond the surface of the painting. As she is also a painter, her work is often accompanied by musical performances.