The muted plaid keeps it classic, but the lace details and silhouette bring in that alt / grunge energyso it works just as well for a concert as it does for everyday outfits
Modern fabrics and undergarments have come such a long way that it's not really necessary to wear slips anymore, but you'll likely still need to wear one with an older dress
They also do not fit natural form (uncorseted).
The directors finds a lot of charming humor in the simple collision of Marins overzealousness and nonchalance compared to Wakanas naivety (which sometimes begs suspension of disbelief) and complete inability to keep it his cool -- and the considered, often delightful character acting of the animation keeps these elements ever-present in their body language
For something edgier, look to Gimaguass silver-studded tank dress or Simon Millers gold-foil fringed minieach designed to catch the light (and every eye in the room)
Paired with grey pants, this outfit suits business-casual environments like most office jobs