Absolute Irony
With the underboob and everything, I feel like the card name is meant in irony. On the other hand, she's apparently wearing an entire ruffle dress between her legs, so I guess, that's... modest?
It's nowhere near as weird as Idle Huntress' buttbra, but few things are.
(Card art of "Absolute Modesty" from Shadowverse, CyGames, submitted by anonymous)