Tinsley is a Human priestess of Morelen, originally from the village of Aughrill. She was recruited into service in the White Army in the nearby city of Semmarch, where she rose to the rank of sergeant under the command of Kent Mydland. She and her squad often worked with Mello Yellow and his crew during their adventures.
Following Semmarch's withdrawal from the White Alliance, she chose to leave the city along with most of the platoon under her command. The group was transferred to Shethkor, where she currently serves as second-in-command of the brigade led by Lieutenant Braxtecer.