Gambling can be Deception vs Insight, or Sleight of Hand vs Perception... or raw INT, or Strength (if it's arm wrestling) or Intimidate or-
This comic follows on from the Previous comic which might help provide context.
Why would Konsi play with such a handicap?
Growing up as a street urchin, she never really had access to lots of clothes. When not wearing armour, or dressing up for an event, she’s still most comfortable wearing just a simple robe.
She’s trying to practice keeping her cool under pressure, and that’s not effective if you have a lot of safety.