Jingo is the daughter of Ashleigh, who runs the Neinvalli store in Crossbell (which was originally situated in the Downtown District, but moved to East Street following the imperial occupation).
Jingo is assisted by her puppy Cerberus (ケルベロス), who she holds in high regard. She trains him to become the best hunting dog so that he can do anything in a pinch, including having him maintain the store when she's busy or even pilot an airship.
In S.1206, the 12-year-old Jingo opens her own branch on Neinvalli in the silent town of Leeves. Her store becomes a favorite spot for Thors Branch Campus students and staff for reliable weapons and information.
During the Great Twilight, Jingo is forced to temporarily shutter her Leeves branch, but eventually opens one in Eryn for the time being. She assists Class VII in their operations.
Upon hearing that the Bobcat was on sale, Jingo attempted to buy the famed airship, but was refused by Josette, who instead sold it to Wilhelm Ballad. Jingo was eventually acquire the Bobcat from Tio after Wilhelm abandoned the "cursed" airship outside the Epstein Foundation, giving Tio a rare golden Mishy plushie statue for it.
Sometime after acquiring the Bobcat, Jingo began using the airship to go down another avenue of business with the airship. The first customer she had was "C", who was actually Rufus in disguise. She did not appear to show any concern with who her customers were, as long as they were able to pay for her services.
Jingo is mentioned in passing indirectly by Morgan of Edith's Blacklight District who states that he thought that Ashleigh's raising her and moving to Crossbell might have softened her up. He continues that Jingo is in the arms dealing business too and a good at it, that she really does take after her mother.
Jingo is once again mentioned by Morgan, who states that he sold about half his inventory to the daughter of weapons dealer he knows, that she has her own airship, so transportation is practically a non-issue, though she haggled the price down because of it. Nadia Rayne states that she can't help feeling she knows this buyer and Swin Abel agrees they might have a friend in common. Morgan tells them he'll let her know they said hi.
The petite but mouthy owner of Neinballi's Leeves branch. Wherever she goes, her equally tiny puppy, Cerberus, is sure to follow.
The Argo A small stone leads to Jingo acquiring her very own airship, which she dubs the Argo. She then uses the high-speed cruiser to start up a courier service.
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