Danni is a beautiful and kind-hearted blue engine. She is in love with Gordon when she first saw him but she gets nervous around him and sometimes her face turns flushed red. Danni's also the only one who never teased Gordon at all and she became Gordon's girlfriend after she saved his life or even stood up for him. Sometimes Danni acts like a sisterly friend to Rosie at times when Rosie's in need. She is NWR no. 26. She is based on Caledonian Railway Single No. 123. She is painted royal blue with red stripes, the numbers "26" on her cab sides and the letters "NWR" on her tender sides. Her friends are Gordon, Emily, Molly, Thomas, Rosie, etc. and her enemies are Diesel, Diesel 10, and Spencer. She works on the main line.