My feelings on the listed drop rates/map costs are mixed. The percentage is bad, but on the bright side there's the guaranteed drop and her base cost appears to be gacha standard rather than increased like some other event units. Min-costing her would be a real bear, but map entry costs are low so scooping up a usable copy and moving on with your life is dead easy. That'd be appealing if there was a concurrent event to go burn my excess stamina on but as things stand it leaves me a bit cold.