Copper ‘Arcy’ Sparks, a combat engineer in the Equestrian Royal Guard. With her parents both being tinkers of some kind, she grew up with a high interest and vast knowledge of how things worked. In her teens she found her father’s service record and began training herself, signing up with her parents’ permission at the age of 16 and choosing to join the combat engineers. Now at age 28, she’s reached the rank of sergeant and has a dozen ponies under her command