Of unknown nature, Welch always appears as an eccentric youth, normally blonde and dressed with blue garments (Star Ocean: The Last Hope being the exception, where she exchanges blue and blonde for purple). She is always friendly and helpful to the party, in opposition to the arrogant Puffy, of similar mysterious origin. She often flirts and spends time looking for single men, due to her obsession with love. In First Departure, she flirts with both Roddick and Ronyx to annoy Millie, possibly Pericci, and Ilia the most. In Second Evolution, she does the same to Ernest, Dias, and Claude, annoying Opera and Rena the most.