Jingo is the daughter of Ashley, who runs the Neinvalli store in Crossbell (which was originally situated in Downtown, but moved to East Street following the imperial occupation). From a young age onward, Jingo assisted her mother in the store. She also took over her mother's foul language and brazen attitude, making quite the impression on clients and tourists.
In S.1206, the 12-year-old Jingo opens her own branch on Neinvalli in the silent town of Leeves. She is assisted by her puppy Kerberos (ケルベロス), which she raises strictly so it will be trained as the strongest hunting dog. Jingo visits Heimdallr to discuss her business, demonstrating incredible negotiation skills at such a young age.