[Callisto]

Yellow Ninja Chick
There really is no tight clothing in game that has that shade of yellow. Infact I think there's only one set of armor at all that is even close to that yellow, and it's a Plate mail set. So I got the closest I could get to the overall feel. She's wearing a mix of Monk artifact armor (head and body) with Ninja relic armor (legs, feet, hands)

Can you view .dats for NPCs in the model viewer? Maybe there's a way to shoop Lion's gear?