What determines Quina's attack damage?

[farplaner]

Well whatever Fork weapon you have for Quina bascailly determines the range of HP damage he/she does to enemies. The more frogs you catch, the better Fork weapon that the Que gives you in the swamps. I never used Quina as much of a fighter, but mainly for Mighty Guard as a blue Magic in bosses battles.

...and for its millionaire ability.